JP2014036120A - Variable capacitance element, mounting circuit, resonance circuit, communication device, communication system, wireless charging system, power supply device and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable capacitance element able to further reduce capacitance variation per variable capacitance element, and a mounting circuit including the variable capacitance element.SOLUTION: A variable capacitance element 10 comprises an element body part 11, a correction unit 12, an external terminal for a first signal 13, an external terminal for a second signal 16, external terminals for control 14, 15, and external terminals for capacitance collection 17, 18. The correction unit 12 includes second variable capacitor parts C9-C11 including a second dielectric layer made from ferroelectric material, and is connected with the element body part 11, and its capacitance changes according to a control voltage signal.

Description

  The present disclosure relates to a variable capacitance element whose capacitance is changed by application of a control voltage, and a mounting circuit, a resonance circuit, a communication device, a communication system, a wireless charging system, a power supply device, and an electronic apparatus including the same.

  Conventionally, a variable capacitor using a ferroelectric material has been proposed as a variable capacitor applicable to a system and apparatus (electronic equipment) that require adjustment of capacitance. In such a variable capacitor, since the relative permittivity is high, if the values such as the electrode size and the thickness of the dielectric layer deviate from the desired values, the deviation of the capacitance value from the desired value also increases. Therefore, due to the influence of manufacturing errors and the like, the variation in capacitance between the variable capacitors increases.

  Therefore, various techniques for suppressing the above-described capacitance variation for each variable capacitor have been proposed (for example, see Patent Document 1). In Patent Document 1, even when the first electrode and the second electrode facing each other with the dielectric layer interposed therebetween are relatively displaced, the first electrode is projected onto the surface of the second electrode. A variable capacitor has been proposed in which the area of the region does not change.

JP 2010-258402 A

  As described above, conventionally, there has been proposed a technique for reducing the capacitance variation between capacitors in a variable capacitor using a ferroelectric material. However, in this technical field, development of a technology capable of further suppressing the capacitance variation of the variable capacitor is required.

  The present disclosure has been made to meet the above demand. An object of the present disclosure is to provide a variable capacitance element capable of further reducing capacitance variation for each variable capacitance element, a mounting circuit including the same, a resonance circuit, a communication device, a communication system, a wireless charging system, a power supply device, and To provide electronic equipment.

  In order to solve the above problems, a variable capacitance element of the present disclosure includes an element main body, a correction unit, a first signal external terminal, a second signal external terminal, a control external terminal, and a capacitance correction element. The configuration includes an external terminal, and the configuration of each unit is as follows. The element main body includes a first variable capacitor including a first dielectric layer formed of a ferroelectric material, and the capacitance changes according to a control voltage signal applied from the outside. The correction unit has a second variable capacitor unit including a second dielectric layer formed of a ferroelectric material, is connected to the element body unit, and changes its capacitance according to a control voltage signal. The first signal external terminal is connected to the element body and receives an AC signal. The second signal external terminal is connected to the element body or the correction unit and receives an AC signal. The control external terminal is connected to the element body and receives a control voltage signal. The external terminal for capacity correction is connected to the correction unit.

  The mounting circuit of the present disclosure includes an element body, a correction unit, a first signal external terminal, a second signal external terminal, a control external terminal, and a configuration similar to the variable capacitance element of the present disclosure. A capacitance correction external terminal and a bias resistor connected to the control external terminal are provided.

  A resonance circuit of the present disclosure includes a resonance capacitor including the variable capacitance element of the present disclosure and a resonance coil connected to the resonance capacitor.

  A communication device of the present disclosure includes a resonance capacitor including the variable capacitance element of the present disclosure, a resonance coil connected to the resonance capacitor, a receiving antenna unit that performs non-contact communication with the outside, and for controlling the variable capacitance element A voltage generation circuit for outputting a control voltage signal to an external terminal.

  The communication system according to the present disclosure includes a transmission device and a reception device that performs non-contact communication with the transmission device. In the communication system according to the present disclosure, the transmission device includes a transmission antenna unit including a resonance capacitor including the variable capacitance element according to the present disclosure and a resonance coil connected to the resonance capacitor.

  The wireless charging system of the present disclosure is configured to include a power feeding device and a power receiving device. In the wireless charging system of the present disclosure, the power feeding device includes a first resonant capacitor including the first variable capacitance element of the present disclosure and a first resonant coil connected to the first resonant capacitor. Part. Furthermore, in the wireless charging system according to the present disclosure, the power receiving device includes a second resonance capacitor including the second variable capacitance element according to the present disclosure, and a second resonance coil connected to the second resonance capacitor, and a power feeding antenna A power receiving antenna unit that performs non-contact communication with the unit.

  The power supply device according to the present disclosure includes a power supply unit, a rectifier circuit unit that converts AC power supplied from the power supply unit into DC power, and a variable impedance unit. In the power supply device according to the present disclosure, the variable impedance unit includes the variable capacitance element according to the present disclosure, and is provided between the power supply unit and the rectifier circuit unit.

  The first electronic device according to the present disclosure includes a communication unit and a voltage generation circuit, and the configuration of the communication unit and the voltage generation circuit is as follows. The communication unit includes a resonance capacitor including the variable capacitance element of the present disclosure and a resonance coil connected to the resonance capacitor, and performs non-contact communication with the outside. The voltage generation circuit outputs a control voltage signal to the control external terminal of the variable capacitance element.

  The second electronic device according to the present disclosure includes a power feeding device and a power receiving device of the wireless power feeding system according to the present disclosure, and a power feeding device unit and a power receiving device unit having the same configuration.

  A third electronic device according to the present disclosure includes a power supply unit, a rectifier circuit unit, and a variable impedance unit of the power supply device according to the present disclosure.

  A fourth electronic device of the present disclosure includes a communication device unit having a configuration similar to that of the first electronic device, and a power supply device unit and a power receiving device unit having a configuration similar to that of the second electronic device. .

  A fifth electronic device of the present disclosure includes a communication device unit having a configuration similar to that of the first electronic device and a power supply device unit having a configuration similar to that of the third electronic device.

  A sixth electronic device according to the present disclosure includes a power supply device unit and a power receiving device unit having a configuration similar to that of the second electronic device, and a power supply device unit having a configuration similar to that of the third electronic device. .

  A seventh electronic device of the present disclosure includes a communication device unit having a configuration similar to that of the first electronic device, a power feeding device unit and a power receiving device unit having a configuration similar to that of the second electronic device, and the third device. A power supply unit having the same configuration as that of the electronic device is provided.

  As described above, in the variable capacitance element of the present disclosure, not only the first and second signal external terminals and the control external terminal as external terminals, but also a correction unit having a second variable capacitor unit is provided. A connected external terminal for capacitance correction is provided. In such a configuration, after the variable capacitance element is mounted on an external circuit board or the like, the electrical connection state between the second signal external terminal and the capacitance correction external terminal is changed, for example, by external wiring or the like. The capacitance of the variable capacitance element can be adjusted.

  In the variable capacitance element of the present disclosure, as described above, the capacitance of the variable capacitance element can be adjusted after the variable capacitance element is mounted on an external circuit board or the like. Therefore, according to the present disclosure, it is possible to reduce the capacitance variation of the variable capacitance element.

It is a schematic block block diagram of the variable capacitance element which concerns on this indication. It is a schematic internal block diagram of the correction | amendment part of the variable capacitance element which concerns on this indication. 1 is a schematic configuration diagram of a variable capacitance element according to a first embodiment. It is a schematic block diagram of the mounting circuit by which the variable capacitance element which concerns on 1st Embodiment was mounted. It is a figure which shows the relationship between the connection state of the correction | amendment part in the variable capacitance element of 1st Embodiment, and the change characteristic of the capacity | capacitance with respect to the variation amount. It is a figure for demonstrating the correction process (1st correction process) of the capacitance variation in the variable capacitance element of 1st Embodiment. It is a schematic block diagram of the mounting circuit by which the variable capacitance element of the modification 1 was mounted. It is a figure which shows the relationship between the connection state of the correction | amendment part in the variable capacitance element of the modification 1, and the change characteristic of the capacity | capacitance with respect to variation amount. FIG. 12 is a diagram for describing a capacitance variation correction process (second correction process) in the variable capacitance element according to Modification 1; FIG. 10 is a diagram for explaining a capacity variation correction process (third correction process) in Modification 2. It is a distribution map of the capacitance variation of the variable capacitance element concerning this indication. It is a figure which shows the relationship between the method of correction | amendment processing, and distribution of the capacitance variation of a variable capacitance element. It is a schematic block diagram of the mounting circuit by which the variable capacitance element which concerns on 2nd Embodiment was mounted. It is a figure which shows the relationship between the connection state of the correction | amendment part in the variable capacitance element of 2nd Embodiment, and the change characteristic of the capacity | capacitance with respect to variation amount. It is a figure for demonstrating the correction process of the capacitance variation in the variable capacitance element of 2nd Embodiment. It is a schematic block diagram of the variable capacitance element which concerns on 3rd Embodiment. It is a schematic block diagram of the mounting circuit by which the variable capacitance element which concerns on 3rd Embodiment was mounted. It is a figure for demonstrating the correction process (1st correction process) of the capacitance variation in the variable capacitance element of 3rd Embodiment. It is a figure for demonstrating the correction process (2nd correction process) of the capacitance variation in the variable capacitance element of 3rd Embodiment. It is a schematic block diagram of the mounting circuit by which the variable capacitance element which concerns on the modification 4 was mounted. It is a schematic block diagram of the mounting circuit by which the variable capacity element concerning the modification 5-1 was mounted. It is a schematic block diagram of the mounting circuit by which the variable capacitance element concerning the modification 5-2 was mounted. It is a schematic block diagram of the mounting circuit by which the variable capacitance element which concerns on 4th Embodiment was mounted. It is a schematic block diagram of the mounting circuit by which the variable capacitance element which concerns on the modification 6 was mounted. It is a schematic block diagram of the communication apparatus (application example 1) containing the variable capacitance element of this indication. It is a schematic block block diagram of the communication system (application example 2) containing the variable capacitance element of this indication. It is a schematic block block diagram of the wireless charging system (application example 3) containing the variable capacitance element of this indication. It is a schematic block block diagram of the power supply device (application example 4) containing the variable capacitance element of this indication.

Hereinafter, configuration examples of variable capacitance elements according to various embodiments of the present disclosure will be described in the following order with reference to the drawings. However, the present disclosure is not limited to the following example.
1. 1. Outline of variable capacitance element according to the present disclosure 1. First embodiment: first configuration example of series variable capacitance element 2. Second embodiment: second configuration example of series variable capacitance element 3. Third embodiment: third configuration example of series variable capacitance element Fourth Embodiment: Configuration Example of Parallel Type Variable Capacitance Element 6. Various application examples

<1. Overview of Variable Capacitance Element According to Present Disclosure>
[Influence of capacity variation]
First, before explaining the outline of the variable capacitance element according to the present disclosure, the reason why it is required to further suppress the capacitance variation of the variable capacitance element in this technical field will be briefly described.

  As described above, in the variable capacitance element using the ferroelectric material, the capacitance variation for each variable capacitance element increases due to the influence of the manufacturing error and the like. When such a variable capacitance element with large capacitance variation is applied to, for example, a communication system, the substantial variable range (usable range) of the capacitance in the variable capacitance device is from the capacitance variable range when there is no capacitance variation. This is the range after subtracting the capacity variation. In this case, the range of the capacity that can be substantially changed in the communication system or the like is narrowed.

  More specifically, for example, consider a case where a variable capacitance element having a capacitance variation of ± 10% (1C ± 0.1C) for each variable capacitance element is applied to a communication system or the like. Also, consider the case of using a variable capacitance element whose capacitance is reduced by 30% when a control voltage Vc of 3 V is applied to the variable capacitance element.

  In this case, for example, in a variable capacitance element having a desired capacitance (capacity variation amount: 0%: capacitance = 1.0 C), when the control voltage Vc is changed between 0 V and 3 V, the capacitance of the variable capacitance element The variable range is 1.0C to 0.7C (ΔC = 0.3C). Further, for example, in a variable capacitance element whose capacitance is 10% higher than the desired capacitance (capacity variation amount is + 10%: capacitance = 1.1C), when the control voltage Vc is changed between 0V and 3V, The variable range of the capacity is 1.1C to 0.77C. Further, for example, in a variable capacitance element whose capacitance is 10% lower than the desired capacitance (capacity variation amount is −10%: capacitance = 0.9 C), when the control voltage Vc is changed between 0 V and 3 V, the variable capacitance element The variable range of the capacitance is 0.9C to 0.63C.

  Therefore, when a variable capacitance element having a capacitance variation of ± 10% as described above is applied to a communication system or the like, the actually usable variable range is the overlap of the above three variable ranges. Part. That is, in the above example, the usable variable range of the capacity is 0.9C to 0.77C (ΔC = 0.13C), which is less than half compared with the case where there is no variation in capacity (ΔC = 0.3% C). It becomes the range. Therefore, when the capacitance variation for each variable capacitance element increases, the variable range of the capacitance that can be actually used becomes very small, and there is an advantage of using a ferroelectric material having a high relative dielectric constant as a material for forming the dielectric layer. It will not be fully utilized.

  Therefore, in the present disclosure, in order to solve the above-described problem, even if the capacitance variation for each variable capacitance element is large, the capacitance variation can be reduced after the variable capacitance element is mounted in a communication system or the like. A variable capacitance element having such a configuration is proposed.

[Outline of configuration of variable capacitance element]
An outline of the variable capacitance element according to the present disclosure will be described with reference to FIGS. 1A and 1B and FIGS. 2A and 2B. 1A and 1B are schematic block configuration diagrams of a variable capacitance element according to the present disclosure, and FIGS. 2A and 2B are schematic internal configuration diagrams of a correction unit 4 described later. is there. Further, here, in order to simplify the description, an example in which a correction unit 4 described later is configured by two correction capacitor units is shown.

  The variable capacitance elements 1 and 2 according to the present disclosure include a capacitor main body 3 (element main body) and a correction unit 4 for correcting the capacitance variation of the capacitor main body 3. The variable capacitance elements 1 and 2 include a signal external terminal 5 (first signal external terminal) connected to the capacitor body 3 and two correction external terminals 6 (capacitance correction external terminals). .

  In the series-type variable capacitance element 1 shown in FIG. 1A, the capacitor main body 3 and the correction unit 4 are connected in series via an internal terminal 7. When the series type variable capacitance element 1 is mounted on a circuit board or the like of an external system, the signal external terminal 5 is connected to one input end (AC1) of the AC signal, and two correction external terminals are connected. At least one of the terminals 6 is connected to the other input terminal (AC2) of the AC signal. That is, in the series type variable capacitance element 1, at least one of the two correction external terminals 6 is also used as a signal external terminal (second signal external terminal).

  On the other hand, in the parallel type variable capacitance element 2 shown in FIG. 1B, the capacitor main body 3 (element main body) and the correction unit 4 are connected in parallel via the internal terminal 7. Further, in the parallel type variable capacitance element 2, of the two correction external terminals 6, one correction external terminal 6 (second signal external terminal) is connected to the capacitor body 3, and the other correction external terminal 6 is connected. Terminal 6 (external terminal for capacitance correction) is connected to the correction unit 4. When the parallel type variable capacitance element 2 is mounted on a circuit board or the like of an external system, the signal external terminal 5 is connected to one input terminal (AC1) of the AC signal and connected to the capacitor body 3. One of the corrected external terminals 6 is connected to the other input terminal (AC2) of the AC signal. That is, in the parallel type variable capacitance element 2, at least one of the correction external terminals 6 connected to the capacitor main body 3 is also used as a signal external terminal.

  Each of the capacitor body 3 and the correction unit 4 is composed of a multilayer capacitor in which a plurality of dielectric layers are stacked with an electrode layer interposed therebetween. In the example shown in FIGS. 2A and 2B, the correction unit 4 is configured by stacking two capacitors. Each dielectric layer may be constituted by a single dielectric film or may be constituted by laminating a plurality of dielectric films according to the manufacturing method.

  As shown in FIGS. 2A and 2B, the correction unit 4 includes a first correction capacitor unit 8 and a second correction capacitor unit 9, and these two correction capacitor units are connected in series or in parallel. Composed. The connection between the first correction capacitor unit 8 and the second correction capacitor unit 9 is made by internal wiring.

[Outline of correction method for capacity variation]
In the present disclosure, after the variable capacitance elements 1 and 2 having the above-described configuration are mounted on a circuit board or the like of an external system, the variable capacitance elements 1 and 2 are set so that the capacitance of the variable capacitance elements 1 and 2 is within a desired range. The capacity of 2 is adjusted as follows. First, the variable capacitance elements 1 and 2 are mounted on a circuit board of an external system, and the capacitance of each correction external terminal 6 is measured in that state (control voltage 0 V).

  Next, based on the measurement result of the capacitance of each correction external terminal 6, the connection between the plurality of correction external terminals 6 on the mounting substrate is performed so that the capacitance of the variable capacitance elements 1 and 2 becomes a capacitance within a desired range. Change state. Specifically, when a plurality of correction external terminals 6 are connected by the external wiring of the mounting substrate at the time of mounting, the wiring pattern of the external wiring is cut and the capacitance of the variable capacitance elements 1 and 2 is cut. Adjust. Further, when the plurality of correction external terminals 6 are not connected to each other at the time of mounting, the predetermined two correction external terminals 6 are connected by an external wiring, and the variable capacitance elements 1 and 2 are connected. Adjust the capacity.

  Such an external wiring cutting technique and connection technique on the mounting substrate can be easily implemented using a conventionally known technique. The method for changing the connection state between the plurality of correction external terminals 6 will be described in more detail in the following various embodiments.

  By using the variable capacitance elements 1 and 2 having the above configuration, the capacitance of the variable capacitance elements 1 and 2 can be easily changed by simply changing the electrical connection state between the plurality of correction external terminals 6 on the substrate after mounting. Can be adjusted to a predetermined range of capacity. That is, in the present disclosure, even if the capacitance variation before mounting of the variable capacitance elements 1 and 2 is large, the capacitance variation of the variable capacitance elements 1 and 2 can be reduced after mounting. Therefore, in the variable capacitance elements 1 and 2 according to the present disclosure, the problem caused by the capacitance variation described above can be solved, and the advantage of using the ferroelectric material having a high relative dielectric constant can be fully utilized.

<2. First Embodiment: First Configuration Example of Series-Type Variable Capacitance Element>
In the first embodiment, a capacitor body unit and a correction unit are connected in series, and a plurality of correction capacitor units in the correction unit are connected in parallel, and a configuration example of a mounting circuit including the variable capacitance element explain.

[Configuration of variable capacitance element]
First, the configuration of the variable capacitance element according to the first embodiment will be described with reference to FIG. FIG. 3 is a schematic configuration diagram of the variable capacitance element according to the first embodiment.

  The variable capacitance element 10 of the first embodiment includes a capacitor main body 11 (element main body) and a correction unit 12 connected in series with the capacitor main body 11. The variable capacitance element 10 includes a signal external terminal 13 (first signal external terminal), four first control external terminals 14 (control external terminals), and four second control external terminals 15 ( Control external terminal). Further, the variable capacitance element 10 includes three correction external terminals (hereinafter referred to as a first correction external terminal 16 to a third correction external terminal 18: a capacitance correction external terminal and a second signal external terminal). .

  The capacitor body 11 includes eight variable capacitor parts (hereinafter referred to as first variable capacitor part C1 to eighth variable capacitor part C8: a first variable capacitor part). In the present embodiment, the first variable capacitor unit C1 to the eighth variable capacitor unit C8 are connected in series. Further, an end portion on the first variable capacitor portion C1 side of the series circuit composed of eight variable capacitor portions is connected to the signal external terminal 13, and an end portion on the eighth variable capacitor portion C8 side of the series circuit is the correction portion 12. Connected to.

  Further, the connection point between the second variable capacitor unit C2 and the third variable capacitor unit C3 and the connection point between the fourth variable capacitor unit C4 and the fifth variable capacitor unit C5 are respectively the corresponding first control external terminals. 14. Further, the connection point between the sixth variable capacitor unit C6 and the seventh variable capacitor unit C7 and the connection point between the eighth variable capacitor unit C8 and the correction unit 12 are also connected to the corresponding first control external terminals 14, respectively. Is done.

  Further, the connection point between the first variable capacitor unit C1 and the second variable capacitor unit C2, and the connection point between the third variable capacitor unit C3 and the fourth variable capacitor unit C4 are respectively the corresponding second control external terminals. 15 is connected. Further, the connection point between the fifth variable capacitor unit C5 and the sixth variable capacitor unit C6 and the connection point between the seventh variable capacitor unit C7 and the eighth variable capacitor unit C8 are respectively corresponding second control external terminals. 15 is connected.

  Note that the connection between the plurality of variable capacitor units described above and between the variable capacitor unit and the corresponding external terminal is performed by internal wiring. As shown in FIG. 4 described later, each first control external terminal 14 is mounted on one of the output terminals of the control voltage power source (via a bias resistor) when mounted on a circuit board or the like of an external system. DC1). Each second control external terminal 15 is connected to the other output terminal (DC2) of the control voltage power supply via a bias resistor.

  Although not shown in FIG. 3, the first variable capacitor unit C1 to the eighth variable capacitor unit C8 are formed by stacking eight dielectric layers (first dielectric layers) with an electrode layer interposed therebetween. Type capacitor. The dielectric layer constituting each variable capacitor section is formed of a ferroelectric material having a large relative dielectric constant, and the capacitance is between the corresponding first control external terminal 14 and second control external terminal 15. It changes according to the applied control voltage Vc (control voltage signal). Specifically, when the control voltage Vc is applied, the capacity of each variable capacitor unit decreases. Further, the dielectric layer constituting each variable capacitor unit may be constituted by one dielectric film or a plurality of dielectric films may be laminated depending on the manufacturing method.

  The correction unit 12 includes three correction variable capacitors (hereinafter referred to as a first correction capacitor unit C9 to a third correction capacitor unit C11, respectively, a second variable capacitor unit). In the present embodiment, the first correction capacitor unit C9 to the third correction capacitor unit C11 are connected in parallel.

  The connection point (parallel connection point) of the first correction capacitor unit C9 to the third correction capacitor unit C11 is the eighth variable capacitor unit C8 of the capacitor main body unit 11 (the eighth variable of the series circuit including eight variable capacitor units). (The end on the capacitor C8 side). Furthermore, the end of the first correction capacitor C9 opposite to the parallel connection point is connected to the first correction external terminal 16. The end of the second correction capacitor unit C10 opposite to the parallel connection point is connected to the second correction external terminal 17. The end of the third correction capacitor unit C11 opposite to the parallel connection point is connected to the third correction external terminal 18.

  As will be described later, in this embodiment, when the variable capacitance element 10 is mounted on an external circuit board or the like, the signal external terminal 13 is connected to one input end (AC1) of the AC signal, and at least the first The 1 correction external terminal 16 is connected to the other input terminal (AC2) of the AC signal. Therefore, the first correction external terminal 16 also functions as a signal external terminal (second signal external terminal).

  Although not shown in FIG. 3, the first correction capacitor unit C9 to the third correction capacitor unit C11 are formed by stacking three dielectric layers (second dielectric layers) with an electrode layer interposed therebetween. Type capacitor. Similarly to the variable capacitor section, the dielectric layer constituting each correction capacitor section is formed of a ferroelectric material having a large relative dielectric constant, and the capacitance is applied to a control voltage Vc (control voltage signal) to be applied. It changes according to. Specifically, when the control voltage Vc is applied, the capacity of each correction capacitor unit decreases. In addition, the dielectric layer constituting each correction capacitor unit may be constituted by one dielectric film or may be constituted by laminating a plurality of dielectric films according to the manufacturing method.

  In the present embodiment, the dielectric layer constituting each variable capacitor part inside the capacitor body 11 and the dielectric layer constituting each correction capacitor part inside the correction part 12 are formed of the same ferroelectric material. . Furthermore, in this embodiment, the electrode layers provided between two dielectric layers adjacent in the stacking direction are all formed of the same material.

  In the present embodiment, the variable capacitor 10 is configured by stacking the first variable capacitor unit C1 to the eighth variable capacitor unit C8 and the first correction capacitor unit C9 to the third correction capacitor unit C11. Furthermore, in the present embodiment, the capacitances of the first variable capacitor unit C1 to the eighth variable capacitor unit C8 are the same, and the capacitances of the first correction capacitor unit C9 to the third correction capacitor unit C11 are also the same. In addition, each capacity | capacitance of the 1st correction capacitor | condenser part C9-the 3rd correction | amendment capacitor | condenser part C11 is made smaller than each capacity | capacitance of the 1st variable capacitor | condenser part C1-the 8th variable capacitor | condenser part C8, for example, is set as about 1/2 capacity | capacitance. .

[Configuration example of mounted circuit]
Next, the configuration of the mounting circuit of this embodiment will be described with reference to FIG. 4 is a schematic configuration diagram of a mounting circuit when the variable capacitance element 10 according to the first embodiment shown in FIG. 3 is mounted on a circuit board or the like of an external system. FIG. 4 shows only a circuit portion of a mounting circuit connected to each external terminal of the variable capacitance element 10 for the sake of simplicity.

  The mounting circuit 20 includes a variable capacitance element 10 and an external wiring 21 that electrically connects the first correction external terminal 16 to the third correction external terminal 18 of the variable capacitance element 10 to each other. The mounting circuit 20 includes five first bias resistors R1 and five second bias resistors R2.

  In the configuration example of the mounting circuit of the present embodiment, when the variable capacitance element 10 is mounted on the mounting circuit 20, the signal external terminal 13 is connected to one AC signal terminal (AC1) and the corresponding first bias resistor R1. Is done. In the present embodiment, all the correction external terminals of the variable capacitance element 10 are connected to the other AC signal terminal (AC2) and the corresponding second bias resistor R2 via the external wiring 21.

  Further, in the present embodiment, each first bias resistor R1 includes a corresponding external terminal (signal external terminal 13 or first control external terminal 14) of the variable capacitance element 10 and one output terminal of a control voltage power supply. (DC1). Each of the second bias resistors R2 has a corresponding external terminal (any one of the second control external terminal 15, the first correction external terminal 16 to the third correction external terminal 18) of the variable capacitance element 10 and a control. It is provided between the other output terminal (DC2) of the voltage power supply.

  Each bias resistor is connected between the AC signal input between the AC terminals of the variable capacitor 10 (between AC1 and AC2 in FIG. 4) and between the DC terminals of the variable capacitor 10 (between DC1 and DC2 in FIG. 4). It is a resistor provided to suppress interference with an applied control voltage signal. Therefore, each bias resistor is composed of a resistance element having a high resistance value such as 100 kΩ.

[Relationship between correction unit connection and capacity change]
Next, the relationship between the connection state between the first correction external terminal 16 and the third correction external terminal 18 (the connection state of the correction unit 12) and the capacitance of the entire variable capacitance element 10 will be specifically described. Therefore, now, in the variable capacitance element 10 of the present embodiment, the capacitances of the first variable capacitor unit C1 to the eighth variable capacitor unit C8 are set to “9C”, and the first correction capacitor unit C9 to the third correction capacitor unit C11. Each capacity is assumed to be “4.5C”. Further, consider the case where the capacitance of the variable capacitance element 10 varies in the range of −10% to + 10%.

  Here, as shown in FIG. 4, all of the first correction external terminal 16 to the third correction external terminal 18 are connected to the other AC signal terminal (AC 2) and the corresponding second signal via the external wiring 21. A state connected to the bias resistor R2 is referred to as a “high-capacity connection state”. The first correction external terminal 16 and the second correction external terminal 17 are connected to the other AC signal terminal (AC2) and the corresponding second bias resistor R2 via the external wiring 21 (described later). FIG. 6A is referred to as “medium capacity connection state”. Further, only the first correction external terminal 16 is connected to the other AC signal terminal (AC2) and the corresponding second bias resistor R2 via the external wiring 21 (see FIG. 6B described later). Is called “low-capacity connection state”.

  In a high-capacity connection state (a state in which the first correction capacitor unit C9 to the third correction capacitor unit C11 all contribute to the correction process), the capacitance of the variable capacitance element 10 is 0.93C to The value is in the range of 1.14C. When the variation amount is 0% in the high-capacity connection state, the capacitance of the variable capacitance element 10 is 1.04C.

  Further, in the medium capacity connection state (the state where the first correction capacitor unit C9 and the second correction capacitor unit C10 contribute to the correction process), the capacitance of the variable capacitance element 10 is 0.90 C in consideration of the variation amount. It becomes a value in a range of ˜1.10C. Note that when the variation amount is 0% in the intermediate capacitance connection state, the capacitance of the variable capacitance element 10 is 1.00 C.

  Furthermore, in the low-capacity connection state (a state where only the first correction capacitor unit C9 contributes to the correction process), the capacitance of the variable capacitance element 10 is in the range of 0.81C to 0.99C in consideration of the variation amount. It becomes the value of. In the low-capacity connection state, when the variation amount is 0%, the capacitance of the variable capacitance element 10 is 0.90C.

  Here, in the variable capacitance element 10 of the present embodiment, the relationship between the connection state of the correction unit 12 and the change in capacitance described above is collectively shown in Table 1 below.

  FIG. 5 is a graph showing the relationship between the connection state of the correction unit 12 shown in Table 1 above and the change in capacity with respect to the variation amount. Note that the horizontal axis of the characteristics shown in FIG. 5 is the amount of variation in the capacitance of the variable capacitance element 10, and the vertical axis is the capacitance value (relative value) of the variable capacitance element 10. 5 is a capacity change characteristic when the connection state of the correction unit 12 is a low-capacity connection state. The broken line characteristics (white triangles) in FIG. 5 are capacity change characteristics when the connection state of the correction unit 12 is the medium capacity connection state. A dotted line characteristic (cross mark) in FIG. 5 is a capacity change characteristic when the connection state of the correction unit 12 is a high capacity connection state. Note that the thick solid line and the broken line arrow in FIG. 5 indicate the state of the first correction process for capacity variation described later.

[First correction process of capacity variation]
Next, a first correction process for capacitance variation of the variable capacitance element 10 in the mounting circuit 20 will be described with reference to FIGS. 4, 5 and 6 (a) and 6 (b). FIGS. 6A and 6B are diagrams showing a state of changing the connection state of the correction unit 12 in the first correction process for capacity variation.

  In the first correction process, the range of required capacitance variation of the variable capacitance element 10 is determined in advance in consideration of, for example, the application. Here, as an example, an example will be described in which correction is performed so that the corrected capacitance of the variable capacitance element 10 falls within a range of 0.93C or more and less than 1.04C.

  In the present embodiment, when the variable capacitance element 10 is mounted on the mounting circuit 20, all of the first correction external terminal 16 to the third correction external terminal 18 are connected via the external wiring 21 as shown in FIG. The other AC signal terminal (AC2) and the corresponding second bias resistor R2 are connected. That is, when the variable capacitance element 10 is mounted on the mounting circuit 20, the connection state of the correction unit 12 is a high-capacity connection state. Therefore, in the mounting circuit 20 shown in FIG. 4, the correction process for the capacitance variation of the variable capacitance element 10 is started from the high capacitance connection state.

  First, the capacitance of the variable capacitance element 10 is measured in the high-capacity connection state shown in FIG. Specifically, the capacitance of any one of the first correction external terminal 16 to the third correction external terminal 18 is measured. Next, when the measured capacity is a value within the range of 0.93C or more and less than 1.04C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the dotted line characteristic in FIG. Then, the correction process is terminated.

  On the other hand, when the capacity measured in the high-capacity connection state is not a value within the range of 0.93C or more and less than 1.04C, the connection state of the correction unit 12 is changed to the medium-capacity connection state. Specifically, as shown in FIG. 6A, a portion of the external wiring 21 that connects the third correction external terminal 18 to the corresponding second bias resistor R2 and the other AC signal terminal (AC2). Cut the pattern.

  Next, as shown in FIG. 6A, the capacitance of the variable capacitance element 10 is measured when the correction unit 12 is in the medium capacitance connection state. Specifically, the capacitance of the first correction external terminal 16 or the second correction external terminal 17 is measured. Next, when the measured capacity is a value within the range of 0.93C or more and less than 1.04C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the broken line in FIG. Then, the correction process is terminated.

  On the other hand, when the capacity measured in the medium capacity connection state is not a value within the range of 0.93C or more and less than 1.04C, the connection state of the correction unit 12 is changed to the low capacity connection state. Specifically, as shown in FIG. 6B, a portion of the external wiring 21 that connects the second correction external terminal 17 to the corresponding second bias resistor R2 and the other AC signal terminal (AC2). Cut the pattern further.

  Next, as shown in FIG. 6B, the capacitance of the variable capacitance element 10 when the correction unit 12 is in the low-capacity connection state is measured. Specifically, the capacitance of the first correction external terminal 16 is measured. Next, when the measured capacity is a value within the range of 0.93C or more and less than 1.04C, that is, the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the one-dot chain line in FIG. If so, the correction process is terminated. On the other hand, when the capacitance measured in the low-capacity connection state is not a value within the range of 0.93C or more and less than 1.04C, the variable capacitance element 10 subjected to the correction process is discarded as a defective product.

  In the mounting circuit 20 of the present embodiment, the capacitance variation of the variable capacitance element 10 is corrected in this way. In the mounting circuit 20 described above, the capacitance variation of the variable capacitor 10 can be reduced from ± 10% to + 4% to −7% after mounting.

[Effects]
As described above, in the mounting circuit 20 of the present embodiment, the capacitance variation of the variable capacitance element 10 can be reduced after the variable capacitance element 10 is mounted. Therefore, in the present embodiment, the above-described problem (problem that the variable range of the capacity that can be actually used becomes small due to the capacitance variation) that occurs after the variable capacitance element 10 is mounted on an external system or the like can be solved. .

  Further, in the present embodiment, after mounting, the capacitance of the variable capacitance element 10 can be adjusted to a capacitance within a desired range, so that the application range of the variable capacitance element 10 can be further expanded. Furthermore, in the variable capacitance element 10 of this embodiment, after mounting, a plurality of types of variable capacitance elements having different capacitances can be obtained by changing the connection state between the plurality of correction external terminals (connection state of the correction unit 12). Can do. Therefore, in this embodiment, the lineup of the variable capacitance elements 10 can be reduced, and the manufacturing cost of the variable capacitance elements can be reduced.

  In the present embodiment, the capacity of the variable capacitor 10 can be easily adjusted not only before the shipment of the system or the like in which the variable capacitor 10 is mounted, but also at the timing of maintenance after the shipment. Therefore, in the present embodiment, even if the capacitance of the variable capacitance element 10 changes due to changes over time, the capacitance can be easily adjusted to a capacitance within a desired range.

  Further, in this embodiment, the capacitance variation can be corrected only by changing the connection state between the plurality of correction external terminals of the variable capacitance element 10 outside (on the mounting circuit). The degree of freedom in designing the mounting circuit 20 can be increased.

  Furthermore, in the variable capacitance element 10 of the present embodiment, the correction unit 12 can be configured in the same manner as the capacitor main body unit 11 as described above, so that the manufacturing process is the same as that of a conventional multilayer variable capacitance capacitor. The variable capacitance element 10 can be manufactured. That is, in the present embodiment, the variable capacitance element 10 can be manufactured without greatly changing the conventional manufacturing process, so that the variable capacitance element 10 can be manufactured at low cost.

[Modification 1]
In the first embodiment, when the variable capacitance element 10 is mounted on the mounting circuit 20, the first correction external terminal 16 to the third correction external terminal 18 are connected to each other by the external wiring 21 (high Although the example of the capacity connection state has been described, the present disclosure is not limited to this. The configuration of the mounting circuit is such that when the variable capacitance element 10 is mounted on the mounting circuit, the first correction external terminal 16 to the third correction external terminal 18 are not connected to each other by the external wiring 21. It may be configured. In Modification 1, one configuration example will be described.

(1) Configuration of Mounting Circuit FIG. 7 shows a schematic configuration of the mounting circuit of Modification 1 when the variable capacitance element 10 according to the first embodiment shown in FIG. 3 is mounted on a circuit board or the like of an external system. Show. FIG. 7 shows only a circuit portion of a mounting circuit connected to each external terminal of the variable capacitance element 10 for the sake of simplicity. Further, in the mounting circuit 25 shown in FIG. 7, the same reference numerals are given to the same components as those of the mounting circuit 20 of the first embodiment shown in FIG.

  As apparent from the comparison between FIG. 7 and FIG. 4, the configuration of the mounting circuit 25 in this example is the connection configuration of the external wiring 21 when the variable capacitance element 10 is mounted in the mounting circuit 20 of the first embodiment. The configuration is changed. Specifically, in this example, at the time of mounting, only the first correction external terminal 16 of the variable capacitance element 10 is connected to the other AC signal terminal (AC2) and the corresponding second bias resistor R2 via the external wiring 21. Connected. That is, in this example, when the variable capacitance element 10 is mounted on the mounting circuit 25, the connection state of the correction unit 12 is a low-capacity connection state. In this example, the configuration other than the connection form of the external wiring 21 is the same as the corresponding configuration of the first embodiment.

  Note that the relationship between the connection state of the correction unit 12 and the change in capacitance in the variable capacitance element 10 in the mounting circuit 25 is similar to the relationship shown in Table 1 above. That is, the relationship between the connection state of the correction unit 12 of the modification 1 and the change in capacity with respect to the amount of variation is the same as that of the first embodiment, and this is shown in FIG. Note that the horizontal axis of the characteristics shown in FIG. 8 is the amount of variation in the capacitance of the variable capacitance element 10, and the vertical axis is the capacitance value (relative value) of the variable capacitance element 10. Also, the characteristics of the alternate long and short dash line in FIG. 8 (characteristics of white square marks) are capacity change characteristics when the connection state of the correction unit 12 is the low capacity connection state. A broken line characteristic (a white triangle mark) in FIG. 8 is a capacity change characteristic when the connection state of the correction unit 12 is a medium capacity connection state. A dotted line characteristic (cross mark) in FIG. 8 is a capacity change characteristic when the connection state of the correction unit 12 is a high capacity connection state. Note that the thick solid line and the broken line arrow in FIG. 8 indicate the state of the second correction process for capacity variation described later.

(2) Second Correction Processing for Capacitance Variation Next, correction processing (second correction processing) for capacitance variation of the variable capacitance element 10 in the mounting circuit 25 is shown in FIGS. 7, 8, 9 (a) and ( This will be described with reference to b). FIGS. 9A and 9B are diagrams illustrating a state of the connection state changing process of the correction unit 12 in the second correction process for variation in capacity.

  In the second correction process, as in the first embodiment (first correction process), for example, the range of required capacitance variation of the variable capacitance element 10 is previously considered in consideration of, for example, the application. Decide. Here, as an example, an example will be described in which correction is performed so that the corrected capacitance of the variable capacitance element 10 falls within the range of 0.93C or more and less than 1.04C, as in the first correction process.

  In the mounting circuit 25 shown in FIG. 7, as described above, when the variable capacitance element 10 is mounted on the mounting circuit 25, the connection state of the correction unit 12 is a low-capacity connection state. Therefore, in the mounting circuit 25 shown in FIG. 7, the correction process of the capacitance variation of the variable capacitance element 10 is started from the low capacitance connection state.

  First, as shown in FIG. 7, the capacitance of the variable capacitance element 10 when the connection state of the correction unit 12 is a low-capacity connection state is measured. Specifically, the capacitance of the first correction external terminal 16 is measured. Next, when the measured capacity is a value within the range of 0.93C or more and less than 1.04C, that is, the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the one-dot chain line in FIG. If so, the correction process is terminated.

  On the other hand, when the capacitance measured in the low-capacity connection state is not a value within the range of 0.93C or more and less than 1.04C, the pattern of the external wiring 21 is changed to change the connection state of the correction unit 12 to the medium-capacity connection state. change. Specifically, as shown in FIG. 9A, the second correction external terminal 17 and the corresponding second bias resistor R2 and the other AC signal terminal (AC2) are electrically connected by, for example, solder or a short resistor. Connection (pattern connection).

  Next, as shown in FIG. 9A, the capacitance of the variable capacitance element 10 when the correction unit 12 is in the medium capacitance connection state is measured. Specifically, the capacitance of the first correction external terminal 16 or the second correction external terminal 17 is measured. Next, when the measured capacity is a value within the range of 0.93C or more and less than 1.04C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the broken line in FIG. Then, the correction process is terminated.

  On the other hand, when the capacity measured in the medium capacity connection state is not a value within the range of 0.93C or more and less than 1.04C, the pattern of the external wiring 21 is changed again to change the connection state of the correction unit 12 to the high capacity connection. Change to state. Specifically, as shown in FIG. 9B, the third correction external terminal 18 is electrically connected to the corresponding second bias resistor R2 and the other AC signal terminal (AC2).

  Next, as shown in FIG. 9B, the capacitance of the variable capacitance element 10 when the connection state of the correction unit 12 is a high-capacity connection state is measured. Specifically, the capacitance of any one of the first correction external terminal 16 to the third correction external terminal 18 is measured. Next, when the measured capacity is a value within the range of 0.93C or more and less than 1.04C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the dotted line characteristic in FIG. Then, the correction process is terminated. On the other hand, when the capacitance measured in the high-capacity connection state is not a value within the range of 0.93C or more and less than 1.04C, the variable capacitance element 10 subjected to the correction process is discarded as a defective product.

  In this example, the variation in capacitance of the variable capacitance element 10 is corrected in this way. In the mounting circuit 25, similarly to the first embodiment, the capacitance variation of the variable capacitor 10 can be reduced from ± 10% to + 4% to −7% after mounting.

  As described above, also in the first modification, the capacitance variation (or the capacitance itself) of the variable capacitance element 10 can be corrected (adjusted) on the mounting circuit in the same manner as in the first embodiment. Therefore, also in this example, the same effect as the first embodiment can be obtained.

  In the second correction process described above, the external wiring 21 is pattern-connected. However, in consideration of the cost, the first correction process (the correction technique of the first embodiment) is used. The method of cutting the pattern of the external wiring 21 is more advantageous.

[Modification 2]
In the first correction process (FIG. 5) and the second correction process (FIG. 8) of the capacitance variation of the variable capacitance element 10 described above, the connection state of the correction unit 12 is 3 in the high capacitance, medium capacitance, and low capacitance connection states. An example of changing to one state has been described. That is, in the first correction process and the second correction process, the capacitance of the variable capacitance element 10 is changed in three stages. However, the present disclosure is not limited to this. The connection state of the correction unit 12 is changed between two connection states among the high-capacity, medium-capacitance, and low-capacity connection states (variable capacitance elements) according to the required capacity variation range of the variable capacitance element 10. The capacity variation may be corrected by changing the capacity of 10 in two steps).

  Here, as an example (Modification 2), a method of correcting the capacity variation by changing the connection state of the correction unit 12 between the two connection states of the medium capacity and the low capacity connection state (third correction process) ). Further, in the third correction process, an example will be described in which the variation in capacitance of the variable capacitance element 10 is corrected in the mounting circuit 25 of the first modification shown in FIG. In the third correction process, an example will be described in which correction is performed so that the corrected capacitance of the variable capacitance element 10 falls within a range of 0.90C or more and less than 1.00C.

  Here, the third correction process will be specifically described with reference to FIGS. 7, 9 (a) and 9 (b), and FIG. 10. FIG. 10 is a characteristic diagram showing the relationship between the connection state of the correction unit 12 and the change in capacitance with respect to the variation amount in Modification 2. Each characteristic in FIG. 10 is a corresponding characteristic in FIG. Is the same characteristic. Further, the thick solid line and the broken line arrow in FIG. 10 indicate the state of the third correction process for capacity variation.

  First, in the third correction process, as shown in FIG. 7, the capacitance of the variable capacitance element 10 when the connection state of the correction unit 12 is a low-capacity connection state is measured. Specifically, the capacitance of the first correction external terminal 16 is measured. Next, when the measured capacity is a value within the range of 0.90 C or more and less than 1.00 C, that is, the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the one-dot chain line in FIG. If so, the correction process is terminated.

  On the other hand, when the capacitance measured in the low-capacity connection state is not a value within the range of 0.90C or more and less than 1.00C, the pattern of the external wiring 21 is changed to change the connection state of the correction unit 12 to the medium-capacity connection state. change. Specifically, as shown in FIG. 9A, the second correction external terminal 17 is electrically connected to the corresponding second bias resistor R2 and the other AC signal terminal (AC2) (pattern connection). To do.

  Next, as shown in FIG. 9A, the capacitance of the variable capacitance element 10 when the correction unit 12 is in the medium capacitance connection state is measured. Specifically, the capacitance of the first correction external terminal 16 or the second correction external terminal 17 is measured. Next, when the measured capacity is a value within the range of 0.90 C or more and less than 1.00 C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the broken line in FIG. Then, the correction process is terminated.

  On the other hand, if the capacitance measured in the medium-capacity connection state is not a value within the range of 0.90 C or more and less than 1.00 C, the variable capacitance element 10 subjected to the correction process is discarded as a defective product.

  In the third correction process, the capacitance variation of the variable capacitance element 10 is corrected in this way. In the third correction process, the capacitance variation of the variable capacitor 10 can be reduced from ± 10% to 0% to −10% after mounting.

  As described above, also in the second modification, the capacitance variation (or the capacitance itself) of the variable capacitor 10 can be corrected (adjusted) on the mounting circuit in the same manner as in the first embodiment. Therefore, also in this example, the same effect as the first embodiment can be obtained.

[Relationship between correction method and capacity variation distribution]
Here, the variation distribution of the capacitance of the variable capacitance element 10 obtained by the first to third correction processes described above will be described. In general, it is considered that the distribution of the capacitance variation of the variable capacitance element 10 is almost a normal distribution when the selection is not performed. Therefore, in the variable capacitance element 10 of the present embodiment, when the above-described correction processing is not performed, the distribution of the capacitance variation in each connection state of the correction unit 12 is considered to be almost a normal distribution.

  FIG. 11 shows the distribution of the capacity variation. The horizontal axis of the distribution characteristics shown in FIG. 11 is the capacity, and the vertical axis is the number of distributions. Further, the characteristic S in FIG. 11 is a distribution of capacity variation when the connection state of the correction unit 12 is a low-capacity connection state, and the characteristic M is when the connection state of the correction unit 12 is a medium-capacity connection state. This is a distribution of capacity variation. Furthermore, a characteristic L in FIG. 11 is a distribution of capacity variation when the connection state of the correction unit 12 is a high capacity connection state. Moreover, the numerical value described in the lower part of the characteristic diagram in FIG. 11 is a value of capacity variation in each connection state.

  The distribution of capacitance variation of the variable capacitance element 10 after mounting varies depending on the method of correcting the capacitance variation. FIGS. 12A to 12C show an example of the relationship between the correction processing technique and the capacity variation distribution. Note that the horizontal axis of each distribution characteristic shown in FIGS. 12A to 12C is capacity, and the vertical axis is the number of distributions.

  FIG. 12A is a distribution diagram of capacity variation when the first correction processing technique is used. The connection state of the correction unit 12 is a high capacity connection state, a medium capacity connection state, and a low capacity connection. It is a distribution map at the time of changing the order of the state and correcting the capacity variation. Note that the capacitance range of the characteristic L in FIG. 12A corresponds to the capacitance variation range indicated by the thick solid line on the dotted line characteristic in FIG. The capacity range of the characteristic M in FIG. 12A corresponds to the capacity variation range indicated by the thick solid line on the broken line characteristic in FIG. The capacity range of the characteristic S in FIG. 12A corresponds to the capacity variation range indicated by the thick solid line on the characteristics of the one-dot chain line in FIG.

  When the first correction processing method is used, a characteristic obtained by superimposing the characteristics L, M, and S in FIG. 12A is the distribution characteristic of the capacitance variation of the variable capacitance element 10. Therefore, when the first correction processing technique is used, as is apparent from FIG. 12A, the variable capacitance element 10 having a capacitance higher than the capacitance of 0% variation in the intermediate capacitance connection state is obtained. Many will be produced.

  FIG. 12B is a distribution diagram of capacity variation when the second correction processing method is used. The connection state of the correction unit 12 is a low-capacity connection state, a medium-capacity connection state, and a high-capacity connection state. FIG. 6 is a distribution diagram in a case where capacity variation is corrected by changing the order of capacity connection states. The capacity range of the characteristic S in FIG. 12B corresponds to the capacity variation range indicated by the thick solid line on the characteristics of the one-dot chain line in FIG. The capacity range of the characteristic M in FIG. 12B corresponds to the capacity variation range indicated by the thick solid line on the broken line characteristics in FIG. The capacity range of the characteristic L in FIG. 12B corresponds to the capacity variation range indicated by the thick solid line on the dotted line characteristics in FIG.

  Even when the second correction processing technique is used, the characteristics obtained by superimposing the characteristics L, M, and S in FIG. 12B are the distribution characteristics of the capacitance variation of the variable capacitance element 10. Therefore, when the second correction processing method is used, as is apparent from FIG. 12B, the variable capacitance element 10 having a capacitance almost equal to the capacitance of 0% variation in the middle capacitance connection state is obtained. Many will be produced.

  Further, FIG. 12C is a distribution diagram of capacity variation when the third correction processing method is used, and the connection state of the correction unit 12 is in the order of low-capacity connection state and medium-capacity connection state. FIG. 6 is a distribution diagram when the variation in capacity is corrected by changing. Note that the capacity range of the characteristic S in FIG. 12C corresponds to the capacity variation range indicated by the thick solid line on the characteristics of the one-dot chain line in FIG. Further, the capacity range of the characteristic M in FIG. 12C corresponds to the capacity variation range indicated by the thick solid line on the broken line characteristic in FIG.

  When the third correction processing method is used, a characteristic obtained by superimposing the characteristic M and the characteristic S in FIG. 12C is a distribution characteristic of the capacitance variation of the variable capacitance element 10. Therefore, in this case, the variable capacitance element 10 having substantially the same capacity as the capacitance of 0% variation in the medium capacitance connection state, or the variable capacitance element having almost the same capacitance as the capacitance of 0% variation in the low capacitance connection state. 10 will be produced a lot.

  As described above, in the variable capacitance element 10 according to the present embodiment and the mounting circuit on which the variable capacitance element 10 is mounted, the generation degree of the capacitance of the variable capacitance element 10 changes according to the method of correcting the capacitance variation. Therefore, on an actual product, a method for correcting the capacitance variation (configuration of the mounting circuit) is appropriately selected according to the required capacitance value of the variable capacitance element 10. For example, when it is necessary to set the capacity of the variable capacitor 10 after mounting to a capacity higher than the capacity of 0% variation in the intermediate capacity connection state, the mounting circuit 20 (first circuit) shown in FIG. The first correction process may be used. Further, for example, when it is necessary to make the capacitance of the variable capacitance element 10 after mounting approximately equal to the capacitance of 0% variation in the intermediate capacitance connection state, the mounting circuit is a mounting circuit 25 as shown in FIG. 1) and the second correction process may be used.

<3. Second Embodiment: Second Configuration Example of Series-Type Variable Capacitance Element>
In the first embodiment, the correction unit 12 is configured by connecting three correction capacitor units in parallel, and the configuration example in which the capacitance of the variable capacitance element 10 can be corrected in three stages has been described. However, the present disclosure is not limited to this, and the number of correction capacitor units (capacity variable number of stages) provided in the correction unit 12 and the capacitance of each correction capacitor unit are, for example, required capacitance correction width and variable capacitance element. It can be appropriately set in consideration of the capacity of the entire 10. In the second embodiment, a configuration example of a variable capacitance element that configures a correction unit using two correction capacitor units and a mounting circuit on which the variable capacitance element is mounted is shown.

[Configuration of variable capacitance element]
FIG. 13 shows a schematic configuration of the variable capacitance element 30 according to the second embodiment and a schematic configuration of a mounting circuit 40 on which the variable capacitance element 30 is mounted. Note that FIG. 13 shows only a circuit portion connected to each external terminal of the variable capacitance element 30 for the sake of simplicity. In the mounting circuit 40 shown in FIG. 13, the same components as those of the mounting circuit 20 of the first embodiment shown in FIG. 4 are denoted by the same reference numerals, and the description of those configurations is omitted.

  The variable capacitance element 30 according to the second embodiment includes a capacitor main body 31 (element main body) and a correction unit 32 connected in series with the capacitor main body 31. The variable capacitance element 30 includes a signal external terminal 13 (first signal external terminal), four first control external terminals 14 (control external terminals), and five second control external terminals 15 ( Control external terminal). Further, the variable capacitance element 30 includes two correction external terminals (first correction external terminal 16 and second correction external terminal 17: capacitance correction external terminal and second signal external terminal).

  The capacitor body 31 includes nine variable capacitor parts (first variable capacitor part C31 to ninth variable capacitor part C39: first variable capacitor part). In the present embodiment, the first variable capacitor unit C31 to the ninth variable capacitor unit C39 are connected in series. Further, an end portion on the first variable capacitor portion C31 side of the series circuit including nine variable capacitor portions is connected to the signal external terminal 13, and an end portion on the ninth variable capacitor portion C39 side of the series circuit is the correction portion 32. Connected to.

  Further, the connection point between the second variable capacitor unit C32 and the third variable capacitor unit C33, and the connection point between the fourth variable capacitor unit C34 and the fifth variable capacitor unit C35 are respectively the corresponding first control external terminals. 14. Further, the connection point between the sixth variable capacitor part C36 and the seventh variable capacitor part C37 and the connection point between the eighth variable capacitor part C38 and the ninth variable capacitor part C39 are also respectively corresponding to the first control external terminals. 14.

  Further, the connection point between the first variable capacitor unit C31 and the second variable capacitor unit C32 and the connection point between the third variable capacitor unit C33 and the fourth variable capacitor unit C34 are respectively the corresponding second control external terminals. 15 is connected. Further, the connection point between the fifth variable capacitor part C35 and the sixth variable capacitor part C36 and the connection point between the seventh variable capacitor part C37 and the eighth variable capacitor part C38 are also respectively corresponding to the second control external terminals. 15 is connected. Furthermore, the connection point between the ninth variable capacitor unit C39 and the correction unit 32 is connected to the corresponding second control external terminal 15.

  Note that the connection between the plurality of variable capacitor units described above and between the variable capacitor unit and the corresponding external terminal is performed by internal wiring. Each of the first control external terminals 14, as shown in FIG. 13 described later, is mounted on one output terminal of the control voltage power source (via a bias resistor) when mounted on an external system circuit board or the like. DC1). Each second control external terminal 15 is connected to the other output terminal (DC2) of the control voltage power supply via a bias resistor.

  Although not shown in FIG. 13, the first variable capacitor unit C31 to the ninth variable capacitor unit C39 are formed by stacking nine dielectric layers (first dielectric layers) with an electrode layer interposed therebetween. Type capacitor. The dielectric layer constituting each variable capacitor section is formed of a ferroelectric material having a large relative dielectric constant, and the capacitance is between the corresponding first control external terminal 14 and second control external terminal 15. It changes according to the applied control voltage Vc (control voltage signal). Specifically, when the control voltage Vc is applied, the capacity of each variable capacitor unit decreases. Further, the dielectric layer constituting each variable capacitor unit may be constituted by one dielectric film or a plurality of dielectric films may be laminated depending on the manufacturing method.

  The correction unit 32 includes two correction variable capacitors (first correction capacitor unit C40 and second correction capacitor unit C41: second variable capacitor unit). In the present embodiment, the first correction capacitor unit C40 and the second correction capacitor unit C41 are connected in parallel.

  The connection point (parallel connection point) of the first correction capacitor unit C40 and the second correction capacitor unit C41 is the ninth variable capacitor unit C39 of the capacitor body 31 (the ninth variable of the series circuit including nine variable capacitor units). To the end of the capacitor C39 side). Further, the end of the first correction capacitor unit C40 opposite to the parallel connection point side is connected to the first correction external terminal 16. The end of the second correction capacitor C41 opposite to the parallel connection point is connected to the second correction external terminal 17.

  As will be described later in the correction process, in the present embodiment, when the variable capacitance element 30 is mounted on an external substrate or the like, at least the first correction external terminal 16 is connected to the other input terminal (AC2 of AC signal). ). Therefore, also in the present embodiment, at least the first correction external terminal 16 also functions as a signal external terminal (second signal external terminal).

  Although not shown in FIG. 13, the first correction capacitor unit C40 and the second correction capacitor unit C41 are formed by stacking two dielectric layers (second dielectric layers) with an electrode layer interposed therebetween. Type capacitor. Similarly to the variable capacitor section, the dielectric layer constituting each correction capacitor section is formed of a ferroelectric material having a large relative dielectric constant, and the capacitance is applied to a control voltage Vc (control voltage signal) to be applied. It changes according to. Specifically, when the control voltage Vc is applied, the capacity of each correction capacitor unit decreases. In addition, the dielectric layer constituting each correction capacitor unit may be constituted by one dielectric film or may be constituted by laminating a plurality of dielectric films according to the manufacturing method.

  In the present embodiment, the dielectric layer constituting each variable capacitor part inside the capacitor body 31 and the dielectric layer constituting each correction capacitor part inside the correction part 32 are formed of the same ferroelectric material. . Furthermore, in this embodiment, the electrode layers provided between two dielectric layers adjacent in the stacking direction are all formed of the same material.

  In the present embodiment, the variable capacitor 30 is configured by stacking the first variable capacitor unit C31 to the ninth variable capacitor unit C39, the first correction capacitor unit C40, and the second correction capacitor unit C41. Furthermore, in the present embodiment, the capacitances of the first variable capacitor unit C31 to the ninth variable capacitor unit C39 are the same, and the capacitances of the first correction capacitor unit C40 and the second correction capacitor unit C41 are also the same. In addition, each capacity | capacitance of 1st correction | amendment capacitor | condenser part C40 and 2nd correction | amendment capacitor | condenser part C41 is made smaller than each capacity | capacitance of 1st variable capacitor | condenser part C31-9th variable capacitor | condenser part C39, for example, is set to about 1/2 capacity. .

[Configuration example of mounted circuit]
As shown in FIG. 13, the mounting circuit 40 includes a variable capacitance element 30 and an external wiring 21 that electrically connects the first correction external terminal 16 and the second correction external terminal 17 of the variable capacitance element 30. Prepare. The mounting circuit 40 includes six first bias resistors R1 and five second bias resistors R2.

  Further, in the configuration example of the mounting circuit of the present embodiment, when the variable capacitance element 30 is mounted on the mounting circuit 40, the signal external terminal 13 is connected to one AC signal terminal (AC1) and the corresponding first bias resistor R1. Connected to. Further, in the present embodiment, all the correction external terminals of the variable capacitance element 30 are connected to the other AC signal terminal (AC2) and the corresponding second bias resistor R2 via the external wiring 21.

  In the present embodiment, each first bias resistor R1 is connected to a corresponding external terminal (signal external terminal 13, first control external terminal 14, first correction external terminal 16 or second correction external terminal) of the variable capacitance element 30. It is provided between the terminal 17) and one output terminal (DC1) of the control voltage power supply. Each second bias resistor R2 is provided between the corresponding second external terminal 15 for control of the variable capacitance element 30 and the other output terminal (DC2) of the control voltage power supply.

[Relationship between correction unit connection and capacity change]
Next, the relationship between the connection state between the first correction external terminal 16 and the second correction external terminal 17 (connection state of the correction unit 32) and the capacitance of the entire variable capacitance element 30 will be specifically described. Now, in the variable capacitance element 30 of the present embodiment, each capacitance of the first variable capacitor unit C31 to the ninth variable capacitor unit C39 is “10C”. Further, each capacitance of the first correction capacitor unit C40 and the second correction capacitor unit C41 is set to “5C”. Further, consider the case where the capacitance of the variable capacitance element 30 varies in the range of −10% to + 10%.

  In this case, in a high-capacity connection state (a state in which the first correction capacitor unit C40 and the second correction capacitor unit C41 all contribute to the correction process), the capacitance of the variable capacitor 30 is 0 in consideration of the variation amount. A value in the range of .90C to 1.10C. When the variation amount is 0% in the high-capacity connection state, the capacity of the variable capacitor 30 is 1.00C.

  In the low-capacity connection state (the state where only the first correction capacitor unit C40 contributes to the correction process), the capacitance of the variable capacitor 30 is in the range of 0.82C to 1.00C in consideration of the variation amount. It becomes the value of. In the low-capacity connection state, when the variation amount is 0%, the capacitance of the variable capacitance element 10 is 0.91C.

  Here, in the variable capacitance element 30 of the present embodiment, the relationship between the connection state of the correction unit 32 and the change in capacitance described above is summarized in Table 2 below.

  FIG. 14 is a graph showing the relationship between the connection state of the correction unit 32 shown in Table 2 above and the change in capacity with respect to the variation amount. Note that the horizontal axis of the characteristics shown in FIG. 14 is the amount of variation in the capacitance of the variable capacitance element 30, and the vertical axis is the capacitance value (relative value) of the variable capacitance element 30. Also, the characteristics of the alternate long and short dash line in FIG. 14 (characteristics of white square marks) are capacity change characteristics when the connection state of the correction unit 32 is the low capacity connection state. The broken line characteristics (white triangles) in FIG. 14 are capacity change characteristics when the connection state of the correction unit 32 is a high capacity connection state. A thick solid line and a broken line arrow in FIG. 14 indicate a state of correction processing of capacity variation described later.

[Capacity variation correction]
Next, a method for correcting the capacitance variation of the variable capacitance element 30 in the mounting circuit 40 will be described with reference to FIGS. FIG. 15 is a diagram illustrating a state of the connection state changing process of the correction unit 32 in the capacity variation correction process.

  Also in the correction processing of the present embodiment, similarly to the first embodiment, the range of required capacitance variation of the variable capacitance element 30 is determined in advance in consideration of, for example, the application. Here, as an example, an example will be described in which correction is performed so that the corrected capacitance of the variable capacitance element 30 falls within a range of 0.90C or more and less than 1.00C.

  In the present embodiment, when the variable capacitance element 30 is mounted on the mounting circuit 40, the first correction external terminal 16 and the second correction external terminal 17 are connected via the external wiring 21, as shown in FIG. The other AC signal terminal (AC2) and the corresponding first bias resistor R1 are connected. That is, when the variable capacitance element 30 is mounted on the mounting circuit 40, the connection state of the correction unit 32 is a high-capacity connection state. Therefore, in the mounting circuit 40 shown in FIG. 13, the correction process for the capacitance variation of the variable capacitance element 30 is started from the high-capacity connection state.

  First, the capacitance of the variable capacitor 30 is measured in the high-capacity connection state shown in FIG. Specifically, the capacitance of one of the first correction external terminal 16 and the second correction external terminal 17 is measured. Next, when the measured capacity is a value within the range of 0.90 C or more and less than 1.00 C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the broken line in FIG. Then, the correction process is terminated.

  On the other hand, when the capacity measured in the high capacity connection state is not a value within the range of 0.90 C or more and less than 1.00 C, the connection state of the correction unit 32 is changed to the low capacity connection state. Specifically, as shown in FIG. 15, the pattern of the external wiring 21 at the portion connecting the second correction external terminal 17 to the corresponding first bias resistor R1 and the other AC signal terminal (AC2) is cut. To do.

  Next, as shown in FIG. 15, the capacitance of the variable capacitance element 30 when the connection state of the correction unit 32 is a low-capacity connection state is measured. Specifically, the capacitance of the first correction external terminal 16 is measured. Next, when the measured capacity is a value within the range of 0.90 C or more and less than 1.00 C, that is, the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the one-dot chain line in FIG. If so, the correction process is terminated.

  On the other hand, when the capacitance measured in the low-capacity connection state is not a value within the range of 0.90 C or more and less than 1.00 C, the variable capacitor 30 that has been subjected to the correction process is discarded as a defective product.

  In the mounting circuit 40 of the present embodiment, the capacitance variation of the variable capacitance element 30 is corrected in this way. In the mounting circuit 40 described above, the capacitance variation of the variable capacitor 30 can be reduced from ± 10% to 0% to −5% after mounting.

  As described above, also in the present embodiment, the capacitance variation (or the capacitance itself) of the variable capacitance element 30 can be corrected (adjusted) on the mounting circuit in the same manner as in the first embodiment. Therefore, also in the present embodiment, the same effect as in the first embodiment can be obtained.

[Modification 3]
In the second embodiment, similarly to the first correction process described in the first embodiment, the pattern of the external wiring 21 that connects the correction external terminals is cut to correct the capacitance variation. Although described, the present disclosure is not limited to this. Also in this embodiment, similarly to the second and third correction processes described in the first and second modifications, capacitance variation may be corrected by pattern connection of the external wiring 21.

  In this case, when the variable capacitance element 30 is mounted on the mounting circuit, the wiring pattern of the external wiring 21 between the first correction external terminal 16 and the second correction external terminal 17 is shown in FIG. The configuration is the same as that shown in FIG. That is, the mounting circuit is configured such that when the variable capacitance element 30 is mounted on the mounting circuit, the connection state of the correction unit 32 becomes a low-capacity connection state. In the mounting circuit having such a configuration, the connection state of the correction unit 32 is changed from the low-capacity connection state to the high-capacity connection state (between the first correction external terminal 16 and the second correction external terminal 17 is externally connected). The capacitance variation of the variable capacitance element 30 is corrected by connecting with the wiring 21).

<4. Third Embodiment: Third Configuration Example of Series Type Variable Capacitance Element>
In the first and second embodiments described above, the example in which the correction unit is configured by connecting a plurality of correction capacitor units in parallel has been described, but the present disclosure is not limited thereto. In the present disclosure, a correction unit may be configured by connecting a plurality of correction capacitor units in series (see FIG. 2A). In the third embodiment, an example will be described.

[Configuration of variable capacitance element]
FIG. 16 illustrates a schematic configuration of a variable capacitance element according to the third embodiment of the present disclosure. In the variable capacitance element 50 shown in FIG. 16, the same components as those of the variable capacitance element 10 shown in FIG. 3 are denoted by the same reference numerals, and description of those configurations is omitted.

  The variable capacitance element 50 of the present embodiment includes a capacitor main body 11 (element main body) and a correction unit 52 connected in series with the capacitor main body 11. The variable capacitance element 50 includes a signal external terminal 13 (first signal external terminal), four first control external terminals 14 (control external terminals), and four second control external terminals 15 ( Control external terminal). Further, the variable capacitance element 50 includes three correction external terminals (first correction external terminal 16 to third correction external terminal 18: capacitance correction external terminal and second signal external terminal). As is clear from comparison between FIG. 16 and FIG. 3, the variable capacitance element 50 of the present embodiment has a configuration in which the configuration of the correction unit is changed in the variable capacitance element 10 of the first embodiment. Therefore, only the configuration of the correction unit 52 will be described here.

  The correction unit 52 includes three correction variable capacitors (first correction capacitor unit C51 to third correction capacitor unit C53: second variable capacitor unit). In the present embodiment, the first correction capacitor unit C51 to the third correction capacitor unit C53 are connected in series.

  The end of the series circuit including the first correction capacitor unit C51 to the third correction capacitor unit C53 on the first correction capacitor unit C51 side is connected to the eighth variable capacitor unit C8 of the capacitor body 11. Furthermore, the end of the series circuit including the first correction capacitor unit C51 to the third correction capacitor unit C53 on the third correction capacitor unit C53 side is connected to the first correction external terminal 16. The connection point between the second correction capacitor unit C52 and the third correction capacitor unit C53 is connected to the second correction external terminal 17. A connection point between the first correction capacitor unit C51 and the second correction capacitor unit C52 is connected to the third correction external terminal 18.

  In the present embodiment, as in the above-described various embodiments, the dielectric layers (first dielectric layers) constituting the variable capacitor portions in the capacitor body 11 and the correction capacitor portions in the correction portion 52 are provided. The constituent dielectric layer (second dielectric layer) is formed of the same ferroelectric material. Each dielectric layer may be constituted by a single dielectric film or may be constituted by laminating a plurality of dielectric films according to the manufacturing method. In the present embodiment, the first variable capacitor unit C1 to the eighth variable capacitor unit C8 (first variable capacitor unit) and the first correction capacitor unit C51 to the third correction capacitor unit C53 are stacked to form a variable capacitance. The element 50 is configured. Furthermore, in the present embodiment, the first variable capacitor unit C1 to the eighth variable capacitor unit C8 and the first correction capacitor unit C51 to the third correction capacitor unit C53 have the same capacitance.

[Configuration example of mounted circuit]
FIG. 17 shows a schematic configuration of a mounting circuit when the variable capacitor 50 according to the third embodiment shown in FIG. 16 is mounted on a circuit board or the like of an external system. Note that FIG. 17 shows only a circuit portion connected to each external terminal of the variable capacitance element 50 for the sake of simplicity. In the mounting circuit 60 shown in FIG. 17, the same reference numerals are given to the same components as those of the mounting circuit 20 shown in FIG. 4, and description of those components is omitted.

  The mounting circuit 60 includes a variable capacitance element 50, a selection unit 61, six first bias resistors R1, and six second bias resistors R2. The mounting circuit 60 also includes a first external wiring 62 that connects a connection point between the first correction external terminal 16 of the variable capacitance element 50 and the corresponding second bias resistor R2 and the first selection terminal 61a of the selection unit 61. Is provided. The mounting circuit 60 includes a second external wiring 63 that connects a connection point between the second correction external terminal 17 and the first bias resistor R 1 and the second selection terminal 61 b of the selection unit 61. Further, the mounting circuit 60 includes a third external wiring 64 that connects a connection point between the third correction external terminal 18 and the second bias resistor R2 and the third selection terminal 61c of the selection unit 61.

  In the mounting circuit 60 of the present embodiment, when the variable capacitance element 50 is mounted on the mounting circuit 60, the signal external terminal 13 is connected to one AC signal terminal (AC1) and the corresponding first bias resistor R1. Is done. Furthermore, in the present embodiment, any one of the first correction external terminal 16 to the third correction external terminal 18 is connected to the other AC signal terminal (AC2) and the corresponding bias resistor via the external wiring.

  In the present embodiment, each first bias resistor R1 has a corresponding external terminal (any one of the signal external terminal 13, the first control external terminal 14, and the second correction external terminal 17) of the variable capacitance element 50, and It is provided between one output terminal (DC1) of the control voltage power supply. Each of the second bias resistors R2 has a corresponding external terminal (any one of the second control external terminal 15, the first correction external terminal 16, and the third correction external terminal 18) of the variable capacitance element 50 and a control. It is provided between the other output terminal (DC2) of the voltage power supply. Each bias resistor can be configured in the same manner as that of the first embodiment.

  The selection unit 61 is a circuit unit that changes the connection state of the correction capacitor unit in the correction unit 52, and can be configured by, for example, a land pattern or a changeover switch provided on the substrate of the mounting circuit 60. As will be described later, the selection unit 61 changes the connection state between the first selection terminal 61a and the third selection terminal 61c during the correction process of the capacitance variation of the variable capacitance element 50, thereby correcting the correction capacitor in the correction unit 52. Change the connection status of the part.

[Relationship between correction unit connection and capacity change]
Next, the relationship between the connection state between the first correction external terminal 16 and the third correction external terminal 18 (connection state of the correction unit 52) and the capacitance of the entire variable capacitance element 50 will be specifically described. Now, in the variable capacitance element 50 of the present embodiment, each capacitance of the first variable capacitor unit C1 to the eighth variable capacitor unit C8 and the first correction capacitor unit C51 to the third correction capacitor unit C53 is set to “10C”. Further, consider a case where the capacitance of the variable capacitance element 50 varies in the range of −10% to + 10%.

  In this case, in the low-capacity connection state (a state in which all of the first correction capacitor unit C51 to the third correction capacitor unit C53 contribute to the correction process), the capacitance of the variable capacitance element 50 takes into account the variation amount described above. The value is in the range of 0.82C to 1.00C. In the low-capacity connection state, when the variation amount is 0%, the capacitance of the variable capacitance element 50 is 0.91C.

  Further, in the intermediate capacitance connection state (the state where the first correction capacitor unit C51 and the second correction capacitor unit C52 contribute to the correction process), the capacitance of the variable capacitance element 50 is 0.90 C in consideration of the variation amount. It becomes a value in a range of ˜1.10C. Note that when the variation amount is 0% in the intermediate capacitance connection state, the capacitance of the variable capacitance element 50 is 1.00C.

  Furthermore, in the high-capacity connection state (the state where only the first correction capacitor unit C51 contributes to the correction process), the capacitance of the variable capacitance element 50 is in the range of 1.00C to 1.22C in consideration of the variation amount. Value. In the high capacity connection state, when the variation amount is 0%, the capacitance of the variable capacitance element 50 is 1.11C.

  Here, in the variable capacitance element 50 of the present embodiment, the relationship between the connection state of the correction unit 52 and the change in capacitance described above is summarized in Table 3 below.

  FIGS. 18 and 19 are graphs showing the relationship between the connection state of the correction unit 52 shown in Table 3 and the change in capacity with respect to the variation amount. The horizontal axis of the characteristics shown in FIGS. 18 and 19 is the variation amount of the capacitance of the variable capacitance element 50, and the vertical axis is the capacitance value (relative value) of the variable capacitance element 50. 18 and 19 is a capacity change characteristic when the connection state of the correction unit 52 is a low-capacity connection state. 18 and 19 is a capacity change characteristic when the connection state of the correction unit 52 is a medium capacity connection state. The dotted line characteristics (cross marks) in FIGS. 18 and 19 are capacity change characteristics when the connection state of the correction unit 52 is the high capacity connection state. Note that a thick solid line and a broken line arrow in FIG. 18 indicate the state of a first correction process for capacity variation described later, and a thick solid line and a broken line arrow in FIG. The state of a correction process is shown.

[First correction process of capacity variation]
Next, a first correction method for capacitance variation of the variable capacitance element 50 in the mounting circuit 60 will be described with reference to FIGS. In the first correction process, similarly to the above-described various embodiments, the range of required capacitance variation of the variable capacitance element 50 is determined in advance in consideration of, for example, the application. Here, as an example, an example will be described in which correction is performed so that the corrected capacitance of the variable capacitance element 50 falls within the range of 0.94C or more and less than 1.05C.

  In the present embodiment, when the variable capacitance element 50 is mounted on the mounting circuit 60, the first selection terminal 61a to the third selection terminal 61c of the selection unit 61 are not connected to each other. In this case, all of the first correction capacitor unit C51 to the third correction capacitor unit C53 in the correction unit 52 contribute to the capacitance value of the entire variable capacitance element 50, and the connection state of the correction unit 51 is a low-capacitance connection state. It becomes.

  In the first correction process, first, the capacitance of the third correction external terminal 18 of the variable capacitance element 50 is measured. Next, when the measured capacity is a value within the range of 0.94C or more and less than 1.05C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the dotted line in FIG. The third selection terminal 61c of the selection unit 61 and the first selection terminal 61a are connected. That is, the first correction external terminal 16 and the third correction external terminal 18 of the variable capacitance element 50 are electrically short-circuited. In this case, the correction process ends with the third selection terminal 61c and the first selection terminal 61a of the selection unit 61 being connected.

  On the other hand, when the measured capacitance of the third correction external terminal 18 is not in the range of 0.94 C or more and less than 1.05 C, the capacitance of the second correction external terminal 17 of the variable capacitance element 50 is measured. Next, when the measured capacity is a value within the range of 0.94C or more and less than 1.05C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the broken line in FIG. The second selection terminal 61b of the selection unit 61 and the first selection terminal 61a are connected. That is, the first correction external terminal 16 and the second correction external terminal 17 of the variable capacitance element 50 are electrically short-circuited. In this case, the correction process ends with the second selection terminal 61b and the first selection terminal 61a of the selection unit 61 being connected.

  On the other hand, when the measured capacitance of the second correction external terminal 17 is not in the range of 0.94 C or more and less than 1.05 C, the capacitance of the first correction external terminal 16 of the variable capacitance element 50 is measured. Next, when the measured capacity is a value within the range of 0.94C or more and less than 1.05C, that is, the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the one-dot chain line in FIG. In this case, the correction process is terminated without connecting the selection terminals of the selection unit 61 to each other.

  When the measured capacitance of the first correction external terminal 16 of the variable capacitance element 50 is not a value within the range of 0.94C or more and less than 1.05C, the variable capacitance element 50 subjected to the correction process is not used. Discard as good. In the first correction process of the present embodiment, the capacitance variation of the variable capacitance element 50 is corrected in this way.

[Second correction process of capacity variation]
In the first correction process, the example in which the capacitance of the variable capacitance element 50 is measured in the order of the third correction external terminal 18, the second correction external terminal 17, and the first correction external terminal 16 has been described. The disclosure is not limited to this. In the second correction process, an example in which the capacitance of the variable capacitance element 50 is measured in the order of the first correction external terminal 16, the second correction external terminal 17, and the third correction external terminal 18 will be described.

  A second correction process for capacitance variation of the variable capacitance element 50 in the mounting circuit 60 will be described with reference to FIGS. In the second correction process, similarly to the above-described various embodiments, the range of required capacitance variation of the variable capacitance element 50 is determined in advance in consideration of, for example, the application. Here, as an example, an example will be described in which correction is performed so that the corrected capacitance of the variable capacitance element 50 falls within a range of 0.94C or more and less than 1.05C, as in the first correction process.

  In the second correction process, first, the capacitance of the first correction external terminal 16 of the variable capacitance element 50 is measured. Next, when the measured capacity is a value within the range of 0.94C or more and less than 1.05C, that is, the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the one-dot chain line in FIG. In this case, the correction process is terminated without connecting the selection terminals of the selection unit 61 to each other.

  On the other hand, when the measured capacitance of the first correction external terminal 16 is not in the range of 0.94 C or more and less than 1.05 C, the capacitance of the second correction external terminal 17 of the variable capacitance element 50 is measured. Next, when the measured capacity is a value within the range of 0.94C or more and less than 1.05C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the broken line in FIG. The second selection terminal 61b of the selection unit 61 and the first selection terminal 61a are connected. That is, the first correction external terminal 16 and the second correction external terminal 17 of the variable capacitance element 50 are electrically short-circuited. In this case, the correction process ends with the second selection terminal 61b and the first selection terminal 61a of the selection unit 61 being connected.

  On the other hand, when the measured capacitance of the second correction external terminal 17 is not in the range of 0.94 C or more and less than 1.05 C, the capacitance of the third correction external terminal 18 of the variable capacitance element 50 is measured. Next, when the measured capacity is a value within the range of 0.94C or more and less than 1.05C, that is, when the measured capacity is the capacity of the region indicated by the thick solid line on the characteristics of the dotted line in FIG. The third selection terminal 61c of the selection unit 61 and the first selection terminal 61a are connected. That is, the first correction external terminal 16 and the third correction external terminal 18 of the variable capacitance element 50 are electrically short-circuited. In this case, the correction process ends with the third selection terminal 61c and the first selection terminal 61a of the selection unit 61 being connected.

  When the measured capacitance of the third correction external terminal 18 of the variable capacitance element 50 is not a value within the range of 0.94C or more and less than 1.05C, the variable capacitance element 50 subjected to the correction process is not used. Discard as good. In the second correction process of the present embodiment, the capacitance variation of the variable capacitance element 50 is corrected in this way.

  As described above, also in the present embodiment, the capacitance variation range of the variable capacitor 50 can be reduced to a desired range after mounting, as in the first and second embodiments. That is, also in this embodiment, the capacitance variation (or capacitance itself) of the variable capacitance element 50 can be corrected (adjusted) on the mounting circuit. Therefore, also in the present embodiment, the same effect as in the first embodiment can be obtained.

  In the present embodiment, the number of capacitor units connected in series that contribute to the capacitance of the entire variable capacitance element 50 varies depending on the connection state of the correction unit 52. That is, in the present embodiment, the withstand voltage of the variable capacitance element 50 changes depending on the connection state of the correction unit 52. Therefore, in the present embodiment, in consideration of the relationship between the connection state of the correction capacitor unit in the correction unit 52 and the breakdown voltage, the number of correction capacitor units (capacity variable number of stages), the capacitance of each correction capacitor unit, and The configuration of the capacitor body 11 is set as appropriate.

  Further, in the first and second correction processes of the capacitance variation described above, the example in which each correction external terminal of the variable capacitance element 50 is sequentially measured has been described, but the present disclosure is not limited thereto. The capacitances of all the external terminals for correction of the variable capacitance element 50 are simultaneously measured, and an appropriate connection state between the first selection terminal 61a to the third selection terminal 61c is selected based on the measurement result, and the variable capacitance element 50 is selected. The capacity variation may be corrected.

[Modification 4]
In the third embodiment, the correction unit 52 is configured by connecting three correction capacitor units in series, and the configuration example in which the capacitance of the variable capacitance element 50 can be corrected in three stages has been described. However, the present disclosure is not limited to this, and the number of correction capacitor units (capacity variable number of stages) provided in the correction unit and the capacitance of each capacitor unit include, for example, the required correction width of the capacitance and the capacitance of the entire variable capacitance element. Etc. can be set as appropriate. Modification 4 shows a configuration example of a variable capacitance element in which two correction capacitor units are connected in series to form a correction unit and a mounting circuit on which the variable capacitance element is mounted.

(1) Configuration of Variable Capacitance Element FIG. 20 shows a schematic configuration of a variable capacitance element 70 according to Modification 4 and a schematic configuration of a mounting circuit 80 on which the variable capacitance element 70 is mounted. Note that FIG. 20 shows only the circuit portion connected to each external terminal of the variable capacitance element 70 for the sake of simplicity. Further, in the mounting circuit 80 of this example shown in FIG. 20, the same components as those of the mounting circuit 60 of the third embodiment shown in FIG. 17 are denoted by the same reference numerals, and description of those configurations is omitted. .

  The variable capacitance element 70 includes a capacitor main body 31 (element main body) and a correction unit 72 connected in series with the capacitor main body 31. The variable capacitance element 70 includes a signal external terminal 13 (first signal external terminal), four first control external terminals 14 (control external terminals), and five second control external terminals 15 ( Control external terminal). Further, the variable capacitance element 70 includes two correction external terminals (first correction external terminal 16 and second correction external terminal 17: capacitance correction external terminal and second signal external terminal).

  The capacitor body 31 includes nine variable capacitors (first variable capacitor unit C31 to ninth variable capacitor unit C39), and has the same configuration as that of the variable capacitor 30 of the second embodiment (FIG. 13). Have.

  The correction unit 72 includes two variable capacitors for correction (a first correction capacitor unit C71 and a second correction capacitor unit C72). In the present embodiment, the first correction capacitor unit C71 and the second correction capacitor unit C72 are connected in series.

  The end of the series circuit including the first correction capacitor unit C71 and the second correction capacitor unit C72 on the first correction capacitor unit C71 side is connected to the ninth variable capacitor unit C39 of the capacitor body 31. Furthermore, the end of the series circuit including the first correction capacitor unit C71 and the second correction capacitor unit C72 on the second correction capacitor unit C72 side is connected to the first correction external terminal 16. A connection point between the first correction capacitor unit C71 and the second correction capacitor unit C72 is connected to the second correction external terminal 17.

  Although not shown in FIG. 20, the first correction capacitor unit C71 and the second correction capacitor unit C72 are formed by stacking two dielectric layers (second dielectric layers) with an electrode layer interposed therebetween. Type capacitor. In addition, the dielectric layer constituting each correction capacitor unit may be constituted by one dielectric film or may be constituted by laminating a plurality of dielectric films according to the manufacturing method.

  In this example, a dielectric layer (first dielectric layer) constituting each variable capacitor portion inside the capacitor main body 31 and a dielectric layer (second dielectric) constituting each correction capacitor portion inside the correction portion 72 are provided. The body layer is made of the same ferroelectric material. In this example, the variable capacitor 70 is configured by laminating the first variable capacitor unit C31 to the ninth variable capacitor unit C39, the first correction capacitor unit C71, and the second correction capacitor unit C72. Further, in this example, the first variable capacitor unit C31 to the ninth variable capacitor unit C39, the first correction capacitor unit C71, and the second correction capacitor unit C72 have the same capacitance.

(2) Configuration Example of Mounting Circuit The mounting circuit 80 includes a variable capacitance element 70 and a selection unit 81. In addition, the mounting circuit 80 includes a first external wiring 82 that electrically connects the first correction external terminal 16 of the variable capacitance element 70 and the selection unit 81, a second correction external terminal 17 of the variable capacitance element 70, and 2nd external wiring 83 which electrically connects between the selection parts 81 is provided. Further, the mounting circuit 80 includes six first bias resistors R1 and six second bias resistors R2.

  Each first bias resistor R1 is connected to a corresponding external terminal of the variable capacitance element 70 (one of the signal external terminal 13, the first control external terminal 14, and the second correction external terminal 17) and a control voltage. It is provided between one output terminal (DC1) of the power supply. Each of the second bias resistors R2 includes a corresponding external terminal (one of the second control external terminal 15 and the first correction external terminal 16) of the variable capacitance element 70 and the other output terminal of the control voltage power supply. (DC2). Each bias resistor can be configured in the same manner as that of the first embodiment.

  In the mounting circuit 80, the first external wiring 82 is connected to the connection point between the first correction external terminal 16 and the corresponding second bias resistor R2 and the first selection terminal 81a of the selection unit 81, as shown in FIG. And connect. On the other hand, the second external wiring 83 connects the connection point between the second correction external terminal 17 and the corresponding first bias resistor R 1 and the second selection terminal 81 b of the selection unit 81. The selection unit 81 is a circuit unit that changes the connection state of the correction capacitor unit in the correction unit 72. Specifically, the selection unit 81 changes the connection state between the first selection terminal 81 a and the second selection terminal 81 b during the correction process of the capacitance variation of the variable capacitance element 70, thereby changing the correction capacitor unit in the correction unit 72. Change the connection status.

  Also in the mounting circuit 80 having the above-described configuration, the range of capacitance variation of the variable capacitance element 70 can be reduced to a desired range by the selection unit 81 after mounting in the same manner as in the third embodiment. That is, also in this example, the capacitance variation (or capacitance itself) of the variable capacitance element 70 can be corrected (adjusted) on the mounting circuit, and the same effect as in the first embodiment can be obtained.

[Modification 5]
In the third embodiment, the example in which the connection state of the correction unit is changed and the capacitance variation of the variable capacitance element is corrected by the selection unit provided in the mounting circuit has been described, but the present disclosure is not limited thereto. For example, similarly to the first and second embodiments described above, the capacitance variation of the variable capacitance element may be corrected by cutting or connecting the pattern of the external wiring between the plurality of correction external terminals. . In Modification 5, an example will be described.

(1) Modification 5-1
FIG. 21 shows a first configuration example (Modification 5-1) of the variable capacitance element 50 in this example and a mounting circuit on which the variable capacitance element 50 is mounted. In the mounting circuit 90 of this example shown in FIG. 21, the same reference numerals are given to the same configurations as those of the mounting circuit 60 of the third embodiment shown in FIG. As is clear from comparison between FIG. 21 and FIG. 17, the configuration of the variable capacitance element 50 in this example is the same as that of the third embodiment. The description of the configuration is omitted.

  The mounting circuit 90 of this example includes a variable capacitance element 50, five first bias resistors R1, and five second bias resistors R2.

  Each first bias resistor R1 has a corresponding external terminal of the variable capacitance element 50 (one of the signal external terminal 13 and the first control external terminal 14) and one output terminal (DC1) of the control voltage power supply. ). Each of the second bias resistors R2 has a corresponding external terminal (any one of the second control external terminal 15, the first correction external terminal 16, and the third correction external terminal 18) of the variable capacitance element 50 and a control. It is provided between the other output terminal (DC2) of the voltage power supply. Each bias resistor can be configured in the same manner as that of the first embodiment.

  Further, as shown in FIG. 21, the mounting circuit 90 short-circuits between the first correction external terminal 16 and the third correction external terminal 18 of the variable capacitance element 50, and the correction external terminals corresponding to the first correction external terminals. An external wiring 91 is provided for electrically connecting the two bias resistors R2. That is, in the mounting circuit 90 of this example, when the variable capacitance element 50 is mounted on the mounting circuit 90 as in the first embodiment, the first correction external terminal 16 to the third correction external terminal 18 are mounted. Are connected to each other by the external wiring 91 (high capacity connection state).

  In the mounting circuit 90 of this example, the wiring pattern of the external wiring 91 is appropriately cut while measuring the capacitance of each correction external terminal in the same manner as in the first embodiment (the first correction processing). As a result, the capacitance variation of the variable capacitance element 50 is corrected.

  More specifically, first, in the connection state shown in FIG. 21, both terminals of the second correction capacitor unit C52 and both terminals of the third capacitor unit C53 are at the same potential both in terms of alternating current and direct current. These two correction capacitor units do not operate as a capacitive element. Therefore, in the connection state shown in FIG. 21, only the first correction capacitor unit C51 acts as a capacitive element in the correction unit 52, so that the capacitance of the variable capacitance element 50 is maximized (high capacity connection state). However, when the wiring pattern of the external wiring 91 connected to the third correction external terminal 18 and the corresponding second bias resistor R2 is cut, the first correction capacitor unit C51 and the second correction capacitor unit C52 are included in the correction unit 52. Acts as a capacitive element (medium capacity connection state). In the middle capacity connection state, only the third capacitor unit C53 does not operate as a capacitive element.

  In such a case, the combined capacitance of the capacitors in which the first correction capacitor unit C51 and the second correction capacitor unit C52 are connected in series acts as a variable capacitance in the correction unit 52. At this time, the control voltage actually applied to each correction capacitor unit is ½ of the control voltage applied to each variable capacitor unit in the capacitor body 11. That is, in the configuration of this example, the correction capacitance value and the bias dependency (capacitance change) in the correction unit 52 are different from those in the third embodiment shown in FIG.

  Further, when the wiring pattern of the external wiring 91 connected to the second correction external terminal 17 and the corresponding second bias resistor R2 is cut, the first correction capacitor unit C51 to the third correction capacitor unit C53 are included in the correction unit 52. Acts as a capacitive element (low capacitance connection state). In this case, the combined capacitance of the capacitors in which the first correction capacitor unit C51 to the third correction capacitor unit C53 are connected in series acts as a variable capacitance in the correction unit 52. At this time, the control voltage actually applied to each correction capacitor unit is 1/3 of the control voltage applied to each variable capacitor unit in the capacitor body 11.

  As described above, in the configuration of this example, when the capacitance of the variable capacitance element 50 is corrected by cutting the wiring pattern of the external wiring 91, depending on the number of stages of the correction capacitor units that act as the capacitance elements in the correction unit 52. The correction capacitance value changes. Further, in the configuration of this example, the variable width of the correction capacitance in the correction unit 52 is reduced by increasing the number of correction capacitor units that act as capacitive elements in the correction unit 52. However, also in the modified example 5-1, since the initial capacitance of the variable capacitance element 50 can be corrected by changing the connection state of the correction unit 52, the same effect as in the first embodiment can be obtained.

(2) Modification 5-2
FIG. 22 shows a second configuration example (Modification 5-2) of the variable capacitance element 50 in this example and a mounting circuit on which the variable capacitance element 50 is mounted. In addition, in the mounting circuit 95 of the modification 5-2 shown in FIG. 22, the same code | symbol is attached | subjected and shown to the structure similar to the mounting circuit 90 of the said modified example 5-1 shown in FIG.

  As is clear from comparison between FIG. 21 and FIG. 22, in this example, the wiring pattern of the external wiring 91 when the variable capacitance element 50 is mounted on the mounting circuit 95 is different from that of the modified example 5-1. Therefore, only the wiring pattern of the external wiring 91 will be described here.

  In this example, when the variable capacitance element 50 is mounted on the mounting circuit 95, only the first correction external terminal 16 of the variable capacitance element 50 is connected to the corresponding second bias resistor R2 and the other AC signal via the external wiring 91. The configuration is connected to the terminal (AC2). That is, in the mounting circuit 95 of this example, when the variable capacitance element 50 is mounted on the mounting circuit 95, the connection state of the correction capacitor unit in the correction unit 52 is a low-capacitance connection state.

  In the mounting circuit 95 of this example, in the same manner as in the first modification (the second correction process), while measuring the capacitance of each correction external terminal, the external wiring 91 appropriately connects a plurality of correction external terminals. Is connected (pattern connection), and the capacitance variation of the variable capacitance element 50 is corrected.

  In this case, by changing the wiring pattern of the external wiring 91, the number of stages of the correction capacitor unit that functions as a capacitive element in the correction unit 52 changes. Therefore, also in this example, similarly to the modified example 5-1, the correction capacitance value and the bias dependency (capacitance change) in the correction unit 52 are different from those in the third embodiment shown in FIG. Different. However, also in the modified example 5-2, the initial capacitance of the variable capacitance element 50 can be corrected by changing the connection state of the correction unit 52. Therefore, the same effect as in the first embodiment can be obtained.

  In the third embodiment, since the bias resistor is connected to both terminals of each correction capacitor unit in the correction unit 52 of the variable capacitance element 50, the connection state of the correction capacitor unit in the correction unit 52 is described. Regardless of the control voltage, the control voltage applied to each correction capacitor unit is constant. That is, in the third embodiment, regardless of the connection state of the correction capacitor unit in the correction unit 52, the variable amount of the capacitance of each correction capacitor unit is constant.

  On the other hand, in the modified example 5, since the bias resistor is connected only to both ends of the series circuit including the plurality of correction capacitor units in the correction unit 52, the connection state of the correction capacitor unit in the correction unit 52 is changed. Accordingly, the control voltage applied to each correction capacitor unit changes. That is, in the modified example 5, the variable amount of the capacitance of each correction capacitor unit varies depending on the connection state of the correction capacitor unit in the correction unit 52. Therefore, in the fifth modification, the number of correction capacitor units and the number of correction capacitor units are considered in consideration of the relationship between the connection state of the correction capacitor units in the correction unit 52 and the variable amount of each correction capacitor unit. The capacity, the configuration of the capacitor body 11 and the like are set as appropriate.

<5. Fourth Embodiment: Configuration Example of Parallel Type Variable Capacitance Element>
In the fourth embodiment, a configuration example in which the capacitor main body portion and the correction portion of the variable capacitance element are connected in parallel will be described (see FIG. 1B).

[Configuration of variable capacitance element]
FIG. 23 shows a schematic configuration of the variable capacitance element 100 according to the fourth embodiment and a schematic configuration of the mounting circuit 110 on which the variable capacitance element 100 is mounted. In FIG. 23, only the circuit portion connected to each external terminal of the variable capacitance element 100 is shown to simplify the description. Further, in the variable capacitance element 100 and the mounting circuit 110 of the present embodiment shown in FIG. 23, the same reference numerals are given to the same configurations as those of the variable capacitance element 10 and the mounting circuit 20 of the first embodiment shown in FIG. The description of those configurations is omitted.

  The variable capacitance element 100 includes a capacitor main body 101 (element main body) and a correction unit 102. The variable capacitance element 100 includes a signal external terminal 13 (first signal external terminal), two second control external terminals 15, a first correction external terminal 16 (second signal external terminal), and the like. And a second external terminal 17 for correction (capacitance external terminal).

  The capacitor body 101 includes two variable capacitors (a first variable capacitor C91 and a second variable capacitor C92: a first variable capacitor). The first variable capacitor unit C91 and the second variable capacitor unit C92 are connected in series. The connection point between the first variable capacitor unit C91 and the second variable capacitor unit C92 is connected to the corresponding second control external terminal 15.

  Further, the end of the series circuit composed of two variable capacitor sections on the first variable capacitor section C91 side is connected to the signal external terminal 13, and the end of the series circuit on the second variable capacitor section C92 side is the first correction. The external terminal 16 is connected. The connection between the plurality of variable capacitor units and between the variable capacitor unit and the corresponding external terminal is performed by internal wiring.

  The correction unit 102 includes two variable capacitors for correction (first correction capacitor unit C93 and second correction capacitor unit C94: second variable capacitor unit). In the present embodiment, the first correction capacitor unit C93 and the second correction capacitor unit C94 are connected in series.

  The connection point of the first correction capacitor unit C93 and the second correction capacitor unit C94 is connected to the corresponding second control external terminal 15. Further, the end of the series circuit composed of two correction capacitor sections on the first correction capacitor section C93 side is connected to the signal external terminal 13, and the end of the series circuit on the second correction capacitor section C94 side is the second correction. Connected to the external terminal 17. The connection between the plurality of variable capacitor units and between the variable capacitor unit and the corresponding external terminal is performed by internal wiring.

  Although not shown in FIG. 23, the first variable capacitor unit C91 and the second variable capacitor unit C92 are formed by stacking two dielectric layers (first dielectric layers) with an electrode layer interposed therebetween. Type capacitor. Further, the dielectric layer constituting each variable capacitor unit may be constituted by one dielectric film or a plurality of dielectric films may be laminated depending on the manufacturing method.

  Further, the first correction capacitor unit C93 and the second correction capacitor unit C94 are configured by a multilayer capacitor in which two dielectric layers (second dielectric layers) are stacked with an electrode layer interposed therebetween. The dielectric layer constituting each correction capacitor unit may be constituted by one dielectric film or a plurality of dielectric films may be laminated depending on the manufacturing method. Further, in the present embodiment, the dielectric layer constituting each variable capacitor part inside the capacitor body 101 and the dielectric layer constituting each correction capacitor part inside the correction part 102 are formed of the same ferroelectric material. .

  In this embodiment, the variable capacitor 100 is configured by stacking the first variable capacitor unit C91 and the second variable capacitor unit C92, and the first correction capacitor unit C93 and the second correction capacitor unit C94. Further, in the present embodiment, the first variable capacitor unit C91 and the second variable capacitor unit C92 have the same capacitance. Further, the capacitances of the first correction capacitor unit C93 and the second correction capacitor unit C94 are made smaller than the capacitances of the first variable capacitor unit C91 and the second variable capacitor unit C92, for example, about 1/10. be able to.

  Note that the number of correction capacitor units provided in the correction unit 102 and the capacitance of each correction capacitor unit can be appropriately set in consideration of, for example, the required correction width of the capacitance, the capacitance of the entire variable capacitance element, and the like.

[Configuration example of mounted circuit]
As shown in FIG. 23, the mounting circuit 110 according to the present embodiment includes an external connection that electrically connects the variable capacitance element 100 and the first correction external terminal 16 and the second correction external terminal 17 of the variable capacitance element 100. Wiring 111 is provided. The mounting circuit 110 includes two first bias resistors R1 and two second bias resistors R2.

  In the mounting circuit 110 of the present embodiment, when the variable capacitance element 100 is mounted on the mounting circuit 110, the signal external terminal 13 is connected to one AC signal terminal (AC1) and the corresponding first bias resistor R1. . Further, at this time, both the first correction external terminal 16 and the second correction external terminal 17 are connected to the other AC signal terminal (AC2) and the corresponding first bias resistor R1 via the external wiring 111. .

  Each first bias resistor R1 is connected to a corresponding external terminal of the variable capacitance element 100 (any one of the signal external terminal 13, the first correction external terminal 16, and the second correction external terminal 17) and a control voltage power source. It is provided between one output terminal (DC1). On the other hand, each second bias resistor R2 is provided between the corresponding second external terminal 15 for control of the variable capacitance element 100 and the other output terminal (DC2) of the control voltage power supply.

  In the present embodiment, as shown in FIG. 23, when the variable capacitance element 100 is mounted on the mounting circuit 110, the first correction external terminal 16 and the second correction external terminal 17 are connected via the external wiring 111. It will be in the state connected to 1st bias resistance R1 and the other alternating current signal terminal (AC2). Therefore, in this embodiment, when the variable capacitance element 100 is mounted on the mounting circuit 110, the mounting circuit 110 is in a high-capacity connection state.

[Capacity variation correction]
The capacity variation correction process in the mounting circuit 110 of the present embodiment is performed as follows. First, in the high-capacity connection state shown in FIG. 23, the capacitance of one of the first correction external terminal 16 and the second correction external terminal 17 is measured. If the measured capacity is a value within a predetermined capacity variation range, the high capacity connection state shown in FIG. 23 is maintained and the correction process is terminated.

  On the other hand, if the measured capacitance is not a value within the range of the predetermined capacitance variation, the wiring pattern portion of the external wiring 111 that electrically connects the first correction external terminal 16 and the second correction external terminal 17 is determined. The connection state of the variable capacitance element 100 is changed to a low capacitance connection state. Next, the capacitance of the first correction external terminal 16 is measured.

  When the measured capacity is a value within a predetermined capacity variation range, the low-capacity connection state is maintained and the correction process is terminated. If the capacitance of the first correction external terminal 16 of the variable capacitance element 100 measured in the low-capacity connection state is not a value within a predetermined capacitance variation range, the variable capacitance element 100 subjected to the correction process is Discard as defective. In the present embodiment, the capacitance variation of the variable capacitance element 100 is corrected in this way.

  As described above, also in this embodiment, the capacitance variation of the variable capacitance element 100 can be corrected by appropriately cutting the wiring pattern of the external wiring 111 while measuring the capacitance of each correction external terminal. Therefore, also in the present embodiment, the same effect as in the first embodiment can be obtained.

[Modification 6]
(1) Configuration of Mounting Circuit FIG. 24 shows a configuration example of the variable capacitance element 100 according to Modification 6 and a mounting circuit on which the variable capacitance element 100 is mounted. In the mounting circuit 115 of this example shown in FIG. 24, the same reference numerals are given to the same configurations as those of the mounting circuit 110 of the fourth embodiment shown in FIG.

  As is clear from a comparison between FIG. 24 and FIG. 23, in this example, the wiring pattern of the external wiring 111 when the variable capacitance element 100 is mounted on the mounting circuit 115 is different from that of the fourth embodiment. Therefore, only the wiring pattern of the external wiring 111 will be described here.

  In this example, when the variable capacitor 100 is mounted on the mounting circuit 115, only the first correction external terminal 16 of the variable capacitor 100 is connected to the corresponding first bias resistor R1 and the other via the external wiring 111. The configuration is connected to the AC signal terminal (AC2). That is, in the mounting circuit 115 of this example, when the variable capacitance element 100 is mounted on the mounting circuit 115, the mounting circuit 115 is in a low-capacitance connection state.

(2) Capacitance variation correction processing The capacitance variation correction processing in the mounting circuit 115 of this example is performed as follows. First, in the low capacitance connection state shown in FIG. 24, the capacitance of the first correction external terminal 16 is measured. If the measured capacity is a value within a predetermined capacity variation range, the low capacity connection state shown in FIG. 24 is maintained and the correction process is terminated.

  On the other hand, if the measured capacitance is not a value within the range of the predetermined capacitance variation, as shown in FIG. 23, the external wiring 111 electrically connects the first correction external terminal 16 and the second correction external terminal 17. Are connected (pattern connection), and the connection state of the variable capacitance element 100 is changed to a high-capacity connection state.

  Next, the capacitance of the first correction external terminal 16 or the second correction external terminal 17 is measured. When the measured capacity is a value within a predetermined capacity variation range, the high capacity connection state is maintained and the correction process is terminated. When the capacitance of the variable capacitance element 100 measured in the high-capacity connection state is not a value within a predetermined capacitance variation range, the corrected variable capacitance element 100 is discarded as a defective product. In this example, the capacitance variation of the variable capacitance element 100 is corrected in this way.

  As described above, in the sixth modification, the capacitance variation of the variable capacitance element 100 is corrected by appropriately connecting the plurality of correction external terminals with the external wiring 111 while measuring the capacitance of each correction external terminal. be able to. Therefore, also in the present embodiment, the same effect as in the first embodiment can be obtained.

[Modification 7]
In the various embodiments and various modifications described above, the example in which the correction unit is configured with a plurality of correction capacitor units has been described, but the present disclosure is not limited thereto, and the correction unit may be configured with one correction capacitor unit. .

  In this case, for example, in the series-type variable capacitance element (mounting circuit) shown in the first to third embodiments (FIGS. 4, 13, and 17), at the end of the capacitor body on the correction unit side. The connected control external terminal is used as a correction external terminal. More specifically, in the first and third embodiments (FIGS. 4 and 17), the first control external terminal 14 connected to the eighth variable capacitor unit C8 of the capacitor body 11 is connected to the correction external unit. Used as a terminal. In the second embodiment (FIG. 13), the second external terminal for control 15 connected to the ninth variable capacitor part C39 of the capacitor main body 31 is used as an external terminal for correction.

  Further, in the parallel type variable capacitance element 100 (mounting circuit 110) shown in the fourth embodiment (FIG. 23), when the correction unit 102 is composed of one correction capacitor unit, it is connected to the correction unit 102. The second control external terminal 15 may be omitted.

<6. Various application examples>
The variable capacitance element according to the present disclosure and the technique for correcting the capacitance variation may be a system and an apparatus (electronic device) that needs to apply a DC control voltage to the variable capacitance element to adjust the capacitance. For example, the present invention can be applied to any system and apparatus. Hereinafter, various application examples (application examples) of the variable capacitance element of the present disclosure will be described.

[Application Example 1: Communication Device]
First, in Application Example 1, an example in which the variable capacitance element according to the above-described various embodiments and various modifications is applied to a communication device such as an information processing terminal having a non-contact communication function will be described.

  FIG. 25 shows a schematic circuit configuration of a communication apparatus according to Application Example 1. In FIG. 25, only the configuration of the circuit unit of the reception system (demodulation system) of the communication apparatus 200 is shown to simplify the description. Other configurations including the circuit section of the signal transmission system (modulation system) can be configured in the same manner as a conventional communication apparatus.

  The communication device 200 includes a receiving unit 201, a signal processing unit 202, and a control unit 203.

  The reception unit 201 includes a resonance antenna 210 (resonance circuit, reception antenna unit, communication unit), a voltage generation circuit 211 that applies a DC control voltage Vc to the resonance antenna 210, and a coil 212. Note that the receiving unit 201 in this example receives, for example, a signal transmitted by non-contact communication from an external R / W device (not shown) by the resonant antenna 210 and outputs the received signal to the signal processing unit 202. .

  The resonant antenna 210 includes a resonant coil 213 and a resonant capacitor 214. The resonance coil 213 is configured by an element such as a spiral coil. The equivalent circuit of the resonance coil 213 is represented by a series circuit of an inductance component 213a (Ls) and a resistance component 213b (rs: about several ohms) of the resonance coil 213.

  The resonant capacitor 214 includes a constant-capacitance capacitor 215 having a capacitance Co, a variable capacitor 216, and two bias removing capacitors 217 connected to both terminals of the variable capacitor 216, respectively. A constant capacitor 215 and a series circuit including a variable capacitor 216 and two bias removing capacitors 217 are connected in parallel to the resonance coil 213.

That is, the resonant antenna 210 of this example is a tunable resonant antenna in which a part of the resonant capacitor 214 is configured by the variable capacitor 216. Further, the resonance frequency of the resonance antenna 210 of this example is calculated by (LC) ^1/2 from the inductance L of the entire resonance coil 213 and the capacitance C of the entire resonance capacitor 214. The inductance L of the entire resonance coil 213 is determined by, for example, the characteristics of a spiral coil (antenna) and a magnetic sheet (not shown) provided on the spiral coil. Further, the capacitance C of the entire resonance capacitor 214 is mainly determined by the capacitance Co of the constant capacitance capacitor 215 and the capacitance Cv of the variable capacitor 216. However, when the resonance coil 213 is formed of a spiral coil, the capacitance between the lines is also taken into consideration.

  Further, both terminals of the variable capacitor 216 are connected to the two output terminals (DC1 and DC2) of the voltage generation circuit 211, respectively. In this example, one terminal of the variable capacitor 216 is connected to one output terminal (DC1) of the voltage generation circuit 211 via the coil 212.

  The variable capacitor 216 is configured by the variable capacitance element according to the present disclosure described in any of the various embodiments and the various modifications. Note that the variable capacitance element according to the present disclosure is formed of a ferroelectric material having a large relative dielectric constant, and the capacitance Cv changes according to the control voltage Vc (voltage signal) applied from the voltage generation circuit 211. Specifically, when the control voltage Vc is applied from the voltage generation circuit 211, the capacitance Cv of the variable capacitor 216 decreases. Therefore, when the control voltage Vc is applied, the resonant frequency of the resonant antenna 210 increases.

  The coil 212 is provided between one terminal of the variable capacitor 216 and one output terminal (DC1) of the voltage generation circuit 211. In this example, the inductance Ln of the coil 212 is appropriately set so that the circuit including the coil 212 and the variable capacitor 216 acts as a noise filter.

  The signal processing unit 202 performs a predetermined process on the AC signal received by the receiving unit 201 and demodulates the AC signal.

  The control unit 203 is configured by a circuit such as a CPU (Central Processing Unit) for controlling the overall operation of the communication apparatus 200. Further, in this example, the control voltage Vc applied to the variable capacitor 216 is adjusted based on a control signal input from the CPU (control unit 203) to the voltage generation circuit 211, and the reception unit 201 (resonance antenna 210). Adjust the resonance frequency.

[Application Example 2: Communication System]
Next, an example (application example 2) in which the variable capacitance element according to the above-described various embodiments and various modifications is applied to a communication system that transmits and receives information by non-contact communication will be described.

  FIG. 26 shows a schematic block configuration of a communication system according to Application Example 2. FIG. 26 shows only the configuration of the main part involved in non-contact communication in order to simplify the description. In FIG. 26, wiring related to input / output of information between the circuit blocks is indicated by solid arrows, and wiring related to power supply is indicated by dotted arrows.

  The communication system 220 includes a transmission device 221 and a reception device 222. In the communication system 220, information is transmitted and received between the transmission device 221 and the reception device 222 by non-contact communication. As an example of the communication system 220 configured as shown in FIG. 26, for example, a non-contact IC card standard represented by Felica (registered trademark) and a near field communication (NFC) standard are used. A combined communication system is exemplified. Hereinafter, the configuration of each device will be described in more detail.

(1) Transmitting Device The transmitting device 221 is a device having a reader / writer function for reading and writing data without contact with the receiving device 222. The transmission device 221 includes a primary antenna unit (transmission antenna unit) 223, a variable impedance matching unit 224, a transmission signal generation unit 225, a modulation circuit 226, a demodulation circuit 227, a transmission / reception control unit 228, and a transmission side system control unit 229. Further, the transmission device 221 includes a control unit 230 for controlling the overall operation of the transmission device 221.

  The electrical connection relationship between the units in the transmission device 221 is as follows. The primary side antenna unit 223 is connected to the variable impedance matching unit 224 and inputs and outputs signals. In addition, one control terminal of the primary side antenna unit 223 is connected to the transmission / reception control unit 228, and the other control terminal is connected to the control unit 230. The input terminal of the variable impedance matching unit 224 is connected to the output terminal of the transmission signal generation unit 225, and the output terminal of the variable impedance matching unit 224 is connected to the input terminal of the demodulation circuit 227. Further, one control terminal of the variable impedance matching unit 224 is connected to the transmission / reception control unit 228, and the other control terminal is connected to the control unit 230.

  The input terminal of the transmission signal generator 225 is connected to the output terminal of the modulation circuit 226. The input terminal of the modulation circuit 226 is connected to one output terminal of the transmission side system control unit 229. The output terminal of the demodulation circuit 227 is connected to the input terminal of the transmission side system control unit 229. In addition, one input terminal of the transmission / reception control unit 228 is connected to the output terminal of the transmission signal generation unit 225, and the other input terminal is connected to the other output terminal of the transmission-side system control unit 229.

  Next, the configuration and function of each unit of the transmission device 221 will be described. The primary side antenna unit 223 has the same configuration as that of the reception unit 201 (resonance circuit unit) of the application example 1 (FIG. 25), and includes a resonance circuit (resonance antenna 210) including a resonance coil and a resonance capacitor, and a resonance capacitor. And a voltage generation circuit for adjusting the capacitance of The primary side antenna unit 223 transmits a transmission signal having a desired frequency by the resonance circuit and receives a response signal from the receiving device 222 described later. At this time, the voltage generation circuit adjusts the capacitance of the resonance capacitor so that the resonance frequency of the resonance circuit becomes a desired frequency. In this example, the variable capacitor described in any of the above-described various embodiments and various modifications is applied to a variable capacitor (not shown) included in the primary antenna unit 223.

  The variable impedance matching unit 224 is a circuit that performs impedance matching between the transmission signal generation unit 225 and the primary antenna unit 223. Although not shown in FIG. 26, the variable impedance matching unit 224 includes a variable capacitor and a voltage generation circuit for adjusting the capacitance of the variable capacitor. In this example, impedance matching between the transmission signal generation unit 225 and the primary side antenna unit 223 is realized by adjusting the capacitance of the variable capacitor by the voltage generation circuit. In this example, the variable capacitor described in any of the various embodiments and various modifications is applied to the variable capacitor included in the variable impedance matching unit 224.

  The transmission signal generation unit 225 modulates a carrier signal of a desired frequency (for example, 13.56 MHz) with the transmission data input from the modulation circuit 226, and the modulated carrier signal is transmitted to the primary side via the variable impedance matching unit 224. Output to the antenna unit 223.

  The modulation circuit 226 modulates the transmission data input from the transmission-side system control unit 229 and outputs the modulated transmission data to the transmission signal generation unit 225.

  The demodulation circuit 227 acquires the response signal received by the primary side antenna unit 223 via the variable impedance matching unit 224, and demodulates the response signal. Then, the demodulation circuit 227 outputs the demodulated response data to the transmission-side system control unit 229.

  The transmission / reception control unit 228 monitors the communication state such as the transmission voltage and transmission current of the carrier signal transmitted from the transmission signal generation unit 225 to the variable impedance matching unit 224. Then, the transmission / reception control unit 228 outputs a control signal to the variable impedance matching unit 224 and the primary antenna unit 223 according to the monitoring result of the communication state.

  The transmission-side system control unit 229 generates control signals for various controls in accordance with external commands and built-in programs, outputs the control signals to the modulation circuit 226 and the transmission / reception control unit 228, and Control the behavior. Further, the transmission-side system control unit 229 generates transmission data corresponding to the control signal (command signal) and supplies the transmission data to the modulation circuit 226. Further, the transmission-side system control unit 229 performs predetermined processing based on the response data demodulated by the demodulation circuit 227.

  The control unit 230 is configured by a circuit such as a CPU. A plurality of output terminals of the CPU (control unit 230) are connected to corresponding input terminals of the voltage generation circuit in the variable impedance matching unit 224 and the primary side antenna unit 223, respectively. The control unit 230 outputs the control signal input from the transmission / reception control unit 228 to the variable impedance matching unit 224 and the primary antenna unit 223. Based on this control signal, the control voltage applied to the variable capacitor included in the variable impedance matching unit 224 and the primary antenna unit 223 is adjusted. At this time, the control voltage is adjusted so that the impedance matching between the transmission signal generation unit 225 and the primary antenna unit 223 and the resonance frequency of the primary antenna unit 223 are optimized.

  In the example illustrated in FIG. 26, the transmission apparatus 221 has been described with an example in which the transmission / reception control unit 228, the transmission-side system control unit 229, and the control unit 230 (CPU) are separately provided, but the present disclosure is not limited thereto. . The control unit 230 may include a transmission / reception control unit 228 and a transmission-side system control unit 229.

(2) Receiving Device Next, the receiving device 222 will be described. In the example shown in FIG. 26, an example in which the receiving device 222 is configured with a non-contact IC card (data carrier) is shown. In this example, an example in which the reception device 222 has a function of adjusting its own resonance frequency will be described.

  The reception device 222 includes a secondary antenna unit (reception antenna unit) 231, a rectification unit 232, a constant voltage unit 233, a reception control unit 234, a demodulation circuit 235, a reception side system control unit 236, a modulation circuit 237, and a battery 238. .

  The electrical connection relationship between the units in the receiving apparatus 222 is as follows. The output terminal of the secondary side antenna unit 231 is connected to the input terminal of the rectification unit 232, one input terminal of the reception control unit 234, and the input terminal of the demodulation circuit 235. The input terminal of the secondary side antenna unit 231 is connected to the output terminal of the modulation circuit 237, and the control terminal of the secondary side antenna unit 231 is connected to the output terminal of the reception control unit 234. The output terminal of the rectifying unit 232 is connected to the input terminal of the constant voltage unit 233. The output terminal of the constant voltage unit 233 is connected to the power input terminals of the reception control unit 234, the modulation circuit 237, and the demodulation circuit 235.

  The other input terminal of the reception control unit 234 is connected to one output terminal of the reception-side system control unit 236. The output terminal of the demodulation circuit 235 is connected to the input terminal of the reception-side system control unit 236. The input terminal of the modulation circuit 237 is connected to the other output terminal of the reception-side system control unit 236. The power input terminal of the receiving system control unit 236 is connected to the output terminal of the battery 238.

  Next, the configuration and function of each unit of the reception device 222 will be described. Although not shown, the secondary antenna unit 231 includes a resonance circuit including a resonance coil and a resonance capacitor, and the resonance capacitor includes a variable capacitor whose capacitance is changed by applying a control voltage. The secondary side antenna unit 231 is a part that communicates with the transmission device 221 (primary side antenna unit 223) by electromagnetic coupling. The secondary side antenna unit 231 receives a magnetic field generated by the primary side antenna unit 223 and receives a transmission signal from the transmission device 221. To do. At this time, the capacitance of the variable capacitor is adjusted so that the resonance frequency of the secondary antenna unit 231 becomes a desired frequency. In this example, the variable capacitor described in any of the various embodiments and various modifications is applied to the variable capacitor included in the secondary antenna unit 231.

  The rectification unit 232 is configured by a half-wave rectification circuit including, for example, a rectification diode and a rectification capacitor. The rectification unit 232 rectifies the AC power received by the secondary side antenna unit 231 into DC power, and converts the rectified DC power to a constant voltage. Output to the unit 233.

  The constant voltage unit 233 performs voltage fluctuation (data component) suppression processing and stabilization processing on the electric signal (DC power) input from the rectification unit 232, and supplies the processed DC power to the reception control unit 234. Supply. Note that the DC power output via the rectifying unit 232 and the constant voltage unit 233 is used as a power source for operating an integrated circuit (IC) in the receiving device 222.

  The reception control unit 234 is configured by an IC or the like, for example, and monitors the magnitude of the reception signal received by the secondary side antenna unit 231 and the voltage / current phase. And the reception control part 234 controls the resonance characteristic of the secondary side antenna part 231 based on the monitoring result of a received signal, and aims at the optimization of the resonant frequency at the time of reception. Specifically, a control voltage is applied to a variable capacitor included in the secondary side antenna unit 231 to adjust its capacity, thereby adjusting the resonance frequency of the secondary side antenna unit 231.

  The demodulation circuit 235 demodulates the reception signal received by the secondary side antenna unit 231 and outputs the demodulated signal to the reception side system control unit 236.

  The reception-side system control unit 236 determines the content based on the signal demodulated by the demodulation circuit 235, performs necessary processing, and controls the modulation circuit 237 and the reception control unit 234.

  The modulation circuit 237 modulates the reception carrier according to the result (contents of the demodulated signal) determined by the reception-side system control unit 236 to generate a response signal. Then, the modulation circuit 237 outputs the generated response signal to the secondary antenna unit 231. Note that the response signal output from the modulation circuit 237 is transmitted from the secondary side antenna unit 231 to the primary side antenna unit 223 by non-contact communication.

  The battery 238 supplies power to the receiving system control unit 236. The battery 238 is charged by connecting its charging terminal to the external power source 239. As in this example, when the receiving device 222 is configured to incorporate the battery 238, more stable power can be supplied to the receiving-side system control unit 236, and stable operation is possible. In this example, the reception-side system control unit 236 may be driven using DC power generated via the rectification unit 232 and the constant voltage unit 233 without using the battery 238.

  In the communication system 220 configured as described above, data communication is performed in a non-contact manner via electromagnetic coupling between the primary side antenna unit 223 of the transmission device 221 and the secondary side antenna unit 231 of the reception device 222. Therefore, in order to perform efficient communication between the transmission device 221 and the reception device 222, the resonance circuits of the primary side antenna unit 223 and the secondary side antenna unit 231 resonate at the same carrier frequency (for example, 13.56 MHz). Composed.

  In this example, as described above, the variable capacitor included in the primary side antenna unit 223, the variable impedance matching unit 224, and the secondary side antenna unit 231 is mounted on the variable capacitor described in any of the various embodiments and various modifications. A variable capacitance element capable of correcting the capacitance later is applied. Therefore, in the communication system 220 of this example, both the resonance frequency and the impedance matching characteristic can be kept optimal, and the communication characteristic can be improved.

  In this example, the example in which the receiving device 222 is configured by a non-contact IC card (data carrier) is shown, but the present disclosure is not limited to this. As the receiving device 222, for example, a communication device such as an information processing terminal having a non-contact communication function described in the first application example may be used. When the non-contact IC card (data carrier) includes a CPU having a performance equivalent to that of a system CPU mounted on a communication device such as an information processing terminal having a non-contact communication function, for example, the variable capacity of the present disclosure The element can also be applied to such a non-contact IC card.

  In this case, the resonance frequencies of the primary side antenna unit 223 and the secondary side antenna unit 231 can be adjusted separately by the voltage generation circuit. Therefore, in the communication system 220 having such a configuration, even if the reception resonance frequency and / or the transmission resonance frequency is shifted due to various factors, the shift of each resonance frequency can be easily adjusted in each device, and stable. Communication characteristics can be obtained.

[Application Example 3: Wireless Charging System]
Next, an example (application example 3) in which the variable capacitance element according to the above-described various embodiments and various modifications is applied to a wireless charging system that transmits and receives (transmits) power by non-contact communication will be described.

  FIG. 27 shows a schematic block configuration of a wireless charging system according to Application Example 3. FIG. 27 shows only the configuration of the main part involved in non-contact communication for the sake of simplicity. In FIG. 27, wiring related to input / output of information between circuit blocks is indicated by solid arrows, and wiring related to power supply is indicated by dotted arrows.

  The wireless charging system 240 includes a power feeding device 241 (power feeding device unit) and a power receiving device 242 (power receiving device unit). In the wireless charging system 240, power is transmitted and received (transmitted) between the power feeding device 241 and the power receiving device 242 by non-contact communication. In the wireless charging system 240 of this example, a method such as electromagnetic induction or magnetic resonance can be applied as a charging method for performing power supply (charging) without contact. Hereinafter, the configuration of each device will be described in more detail.

(1) Power Supply Device The power supply device 241 is a device that supplies power to a desired electronic device (power receiving device 242) in a contactless manner. The power feeding device 241 includes a primary side antenna unit 243 (power feeding antenna unit), a variable impedance matching unit 244, a transmission signal generation unit 245, a modulation circuit 246, a demodulation circuit 247, a transmission / reception control unit 248, a transmission side system control unit 249, and a control unit. 250.

  The primary antenna unit 243 and the variable impedance matching unit 244 of the power feeding device 241 are configured in the same manner as the primary antenna unit 223 and the variable impedance matching unit 224 of the transmission device 221 of Application Example 2, respectively. That is, also in this example, the primary antenna unit 243 and the variable impedance matching unit 244 of the power feeding device 241 are provided with any of the variable capacitance elements (variable capacitors) described in the various embodiments and the various modifications.

  In addition, the transmission signal generation unit 245, the modulation circuit 246, and the demodulation circuit 247 of the power feeding device 241 are respectively similar to the transmission signal generation unit 225, the modulation circuit 226, and the demodulation circuit 227 of the transmission device 221 of Application Example 2. Composed. Further, the transmission / reception control unit 248, the transmission-side system control unit 249, and the control unit 250 of the power supply device 241 are respectively the transmission / reception control unit 228, the transmission-side system control unit 229, and the control unit of the transmission device 221 of the application example 2. It is configured in the same manner as 230. It should be noted that the electrical connection relationship of each part in the power supply apparatus 241 is the same as that in the transmission apparatus 221 of the application example 2.

  In the example illustrated in FIG. 27, an example in which the transmission / reception control unit 248, the transmission-side system control unit 249, and the control unit 250 (CPU) are separately provided in the power feeding device 241 has been described, but the present disclosure is not limited thereto. . The control unit 250 may include a transmission / reception control unit 248 and a transmission-side system control unit 249.

(2) Power receiving device The power receiving device 242 is configured by a device such as a portable device having a non-contact communication function, for example. The power receiving device 242 includes a secondary side antenna unit (power receiving antenna unit) 251, a rectifying unit 252, a charging control unit 253, a reception control unit 254, a demodulation circuit 255, a reception side system control unit 256, a modulation circuit 257, a battery 258, and a control. A portion 259.

  The electrical connection relationship between the units in the power receiving device 242 is as follows. The output terminal of the secondary antenna unit 251 is connected to the input terminal of the rectification unit 252, one input terminal of the reception control unit 254, and the input terminal of the demodulation circuit 255. Further, the input terminal of the secondary side antenna unit 251 is connected to the output terminal of the modulation circuit 257. Further, one control terminal of the secondary side antenna unit 251 is connected to the output terminal of the reception control unit 254, and the other control terminal is connected to the output terminal of the control unit 259.

  The output terminal of the rectifying unit 252 is connected to the input terminal of the charging control unit 253. The output terminal of the charging control unit 253 is connected to one input terminal of the receiving system control unit 256. In addition, one power output terminal of the charging control unit 253 is connected to each power input terminal of the reception control unit 254, the modulation circuit 257, and the demodulation circuit 255, and the other power output terminal is connected to the charging terminal of the battery 258. The The other input terminal of the reception control unit 254 is connected to one output terminal of the reception-side system control unit 256. The output terminal of the demodulation circuit 255 is connected to the other input terminal of the reception-side system control unit 256. Further, the input terminal of the modulation circuit 257 is connected to the other output terminal of the reception-side system control unit 256. The power input terminal of the receiving system control unit 256 is connected to the output terminal of the battery 258.

  Next, the configuration and function of each unit of the power receiving device 242 will be described. In this example, configurations other than the secondary side antenna unit 251, the charging control unit 253, and the control unit 259 are the same as the corresponding units of the receiving device 222 of the communication system 220 of the application example 2. Therefore, only the configuration of the secondary side antenna unit 251, the charging control unit 253, and the control unit 259 will be described here.

  The secondary antenna unit 251 has the same configuration as the receiving unit 201 (resonance circuit unit) of the application example 1 (FIG. 25), and has a resonance circuit (resonance antenna 210) including a resonance coil and a resonance capacitor. And a voltage generation circuit for adjusting the capacitance of the capacitor. In this example, the variable capacitance element described in any of the various embodiments and various modifications is applied to a variable capacitor (not shown) included in the secondary antenna unit 251.

  The secondary side antenna unit 251 is an antenna unit that performs power transmission by electromagnetic coupling with the power feeding device 241 (primary side antenna unit 243), receives a magnetic field generated by the primary side antenna unit 243, and receives power from the power feeding device 241. Receives transmission power. At this time, the capacitance of the variable capacitor is adjusted by applying a control voltage controlled by the voltage generation circuit to the variable capacitor so that the resonance frequency of the secondary antenna unit 251 becomes a desired frequency. Note that the operation control of the voltage generation circuit (control of the control voltage) is performed based on a control signal input from the control unit 259.

  The charging control unit 253 supplies the electric signal (DC power) input from the rectifying unit 252 to the battery 258 to charge the battery 258 and supplies the battery 258 to the reception control unit 254 as drive power for the reception control unit 254. In addition, the charging control unit 253 monitors the charging status and outputs the monitoring result to the receiving-side system control unit 256. Further, the charging control unit 253 can be connected to the external power supply 260. When the charging control unit 253 is connected to the external power supply 260, the electric power output from the external power supply 260 is supplied to the battery 258 via the charging control unit 253, whereby the battery 258 is charged. Note that when the battery 258 is charged by the external power supply 260, the external power supply 260 may be directly connected to the battery 258.

  The control unit 259 is configured by a circuit such as a CPU. The output terminal of the CPU (control unit 259) is connected to the corresponding input terminal of the voltage generation circuit in the secondary side antenna unit 251. Then, the control unit 259 outputs a control signal input from the reception control unit 254 to the secondary antenna unit 251. Based on this control signal, the control voltage applied to the variable capacitor included in the secondary antenna unit 251 is adjusted. At this time, the control voltage is adjusted so that the resonance frequency of the secondary antenna unit 251 is optimized.

  In the example illustrated in FIG. 27, the power receiving device 242 has been described with an example in which the reception control unit 254, the reception-side system control unit 256, and the control unit 259 (CPU) are separately provided, but the present disclosure is not limited thereto. . The control unit 259 may include a reception control unit 254 and a reception-side system control unit 256.

  In the wireless charging system 240 configured as described above, an electromagnetic wave for power transmission is transmitted from the primary antenna unit 243 based on a signal output from the transmission-side system control unit 249 of the power supply apparatus 241, and the electromagnetic wave is received by the power receiving apparatus 242. Is received by the secondary antenna portion 251. Then, the signal received by the secondary antenna unit 251 is converted into DC power by the rectification unit 252, and the DC power is charged to the battery 258 via the charging control unit 253.

  Further, in the wireless charging system 240 of this example, the signal received by the secondary antenna unit 251 of the power receiving device 242 is demodulated by the demodulation circuit 255. Next, the content of the demodulated data is determined by the reception-side system control unit 256, and the modulation circuit 257 modulates the reception carrier signal according to the result. Then, the modulation circuit 257 transmits the modulated received carrier signal as a response signal to the power feeding device 241 via the secondary antenna unit 251.

  By such a series of recognition processes, it is possible to avoid power transmission to a non-system device or metal. In this recognition process, when it is determined that the transmission is correct, the transmission signal becomes an unmodulated output for power transmission. At this time, in order to perform long-time charging, the recognition process is intermittently performed to ensure safety.

  Furthermore, in the wireless charging system 240 of this example, the charging state is monitored by the charging control unit 253 of the power receiving device 242 as described above. Then, the information on the charging status is transmitted to the power feeding device 241 via the reception-side system control unit 256, the modulation circuit 257, and the secondary antenna unit 251 in order to obtain an optimal charging status. On the other hand, the charging status information returned from the power receiving device 242 is demodulated by the demodulation circuit 247 of the power feeding device 241, and the content of the demodulated data is determined by the transmission-side system control unit 249. Then, the transmission-side system control unit 249 appropriately executes necessary processing based on the determination result.

  In the operation of the wireless charging system 240 described above, the resonance frequencies of the variable impedance matching unit 244, the primary side antenna unit 243, and the secondary side antenna unit 251 are appropriately adjusted by the voltage generation circuit in each unit. Therefore, in the wireless charging system 240 having such a configuration, even if the reception resonance frequency and / or the transmission resonance frequency shift due to various factors, the shift of each resonance frequency can be easily adjusted in each device. A stable power transmission operation can be realized.

[Application Example 4: Power Supply]
Next, an example (application example 4) in which the variable capacitance element (variable capacitor) according to the above-described various embodiments and various modifications is applied to the power supply device will be described.

  FIG. 28 shows a schematic block configuration of a power supply device according to Application Example 4. Here, the power supply device 270 that steps down the voltage (AC 100 V) of the commercial power supply 280 via the power transformer 271 will be described as an example.

  The power supply device 270 includes a power transformer 271 (power supply unit), a variable impedance unit 272, a rectifier circuit 273 (rectifier circuit unit), a constant voltage circuit 274, a first reference voltage power source 275, an error amplifier 276, A second reference voltage power supply 277 and a control unit 278 are provided.

  The electrical connection relationship between the components in the power supply device 270 is as follows. A primary transformer 271a (described later) in the power transformer 271 is connected to a commercial power source 280 as shown in FIG. On the other hand, an output terminal of a secondary-side transformer 271b (described later) in the power transformer 271 is connected to an input terminal of the variable impedance unit 272, and an input terminal of the secondary-side transformer 271b is connected to one output terminal of the rectifier circuit 273. Is done.

  The output terminal of the variable impedance unit 272 is connected to the input terminal of the rectifier circuit 273. In addition, one control terminal of the variable impedance unit 272 is connected to the output terminal of the error amplifier 276, and the other control terminal of the variable impedance unit 272 is connected to the control unit 278. The other output terminal of the rectifier circuit 273 is connected to one input terminal of the constant voltage circuit 274 and one input terminal of the error amplifier 276.

  As shown in FIG. 28, the other input terminal of the constant voltage circuit 274 is connected to the first reference voltage power supply 275, and the output terminal of the constant voltage circuit 274 is connected to the load 281. Further, the other input terminal of the error amplifier 276 is connected to the second reference voltage power source 277.

  Next, the configuration and function of each unit of the power supply device 270 will be described. As shown in FIG. 28, the power transformer 271 includes a primary transformer 271a and a secondary transformer 271b. The power transformer 271 steps down the voltage of the commercial power source 280 at a ratio corresponding to the turn ratio of the primary transformer 271a and the secondary transformer 271b, and outputs the lowered voltage to the variable impedance unit 272.

  Although not shown in FIG. 28, the variable impedance unit 272 includes a variable capacitor and a voltage generation circuit for adjusting the capacitance of the variable capacitor. In this example, the variable capacitor described in any of the various embodiments and various modifications is applied to the variable capacitor included in the variable impedance unit 272.

  The variable impedance unit 272 changes the impedance by increasing / decreasing the capacity of the variable capacitor. As a result, the variable impedance unit 272 increases or decreases the AC voltage input from the secondary transformer 271b, and supplies the increased or decreased AC voltage to the rectifier circuit 273.

  The rectifier circuit 273 is constituted by a half-wave rectifier circuit including a rectifier diode and a rectifier capacitor, for example. The rectifier circuit 273 converts the AC voltage input from the variable impedance unit 272 into a DC voltage, and supplies the DC voltage to the constant voltage circuit 274 and the error amplifier 276.

The constant voltage circuit 274 compares the reference voltage V _ref 1 supplied from the first reference voltage power supply 275 with the DC voltage input from the rectifier circuit 273 to generate a DC voltage having a constant voltage value, and the voltage value is constant. Is supplied to the load 281. Specifically, the constant voltage circuit 284 increases or decreases the voltage drop amount of the input voltage in its own circuit so that the voltage applied to the load 281 becomes the same as the reference voltage V _ref 1.

The error amplifier 276 compares the DC voltage input from the rectifier circuit 273 with the reference voltage V _ref 2 supplied from the second reference voltage power supply 277, and based on this comparison result, the impedance of the variable impedance unit 272 is determined. Control. Normally, the reference voltage V _ref 2 output from the second reference voltage power supply 277 is set to be higher by about 2 [V] than the reference voltage V _ref 1 output from the first reference voltage power supply 275.

  The control unit 278 is configured by a circuit such as a CPU. The output terminal of the CPU (control unit 278) is connected to the corresponding input terminal of the voltage generation circuit in the variable impedance unit 272. Then, the control unit 278 adjusts and outputs the control voltage applied to the variable capacitor in the variable impedance unit 272. In this example, this adjusts the impedance of the variable impedance unit 272.

At this time, the impedance of the variable impedance unit 272 is adjusted so that the DC voltage input to the constant voltage circuit 274 has substantially the same value as the reference voltage V _ref 1 output from the first reference voltage power supply 275. . More specifically, when the load current increases and the AC voltage of the secondary transformer 271b decreases, the control unit 278 reduces the impedance of the variable impedance unit 272. In addition, when the voltage of the commercial power supply 280 increases and the AC voltage of the secondary transformer 271b increases, the control unit 278 increases the impedance of the variable impedance unit 272. Thereby, the AC voltage input to the rectifier circuit 273 is stabilized, and as a result, the input voltage of the constant voltage circuit 274 can also be controlled stably.

  In the power supply device 270 having the above-described configuration, the rectifier circuit 273 converts the AC voltage stepped down at a rate corresponding to the winding ratio between the primary transformer 271a and the secondary transformer 271b of the power transformer 271 into a DC voltage. The voltage drop type constant voltage circuit 274 generates a DC voltage with a constant voltage value based on the DC voltage output from the rectifier circuit 273 and supplies the DC voltage with the constant voltage value to the load 281.

Conventionally, in the power supply device 270 as described above, the DC voltage output from the rectifier circuit 273, that is, the input voltage of the constant voltage circuit 274 changes due to the increase or decrease of the load current or the voltage change of the primary transformer 271a. Normally, in response to such a change in the input voltage of the constant voltage circuit 274, the voltage drop type constant voltage circuit 274 has the same voltage applied to the load 281 as the reference voltage V _ref 1 as described above. As described above, the voltage supplied to the load 281 is stabilized by increasing or decreasing the voltage drop amount of the input voltage. In this case, the voltage drop amount of the input voltage in the constant voltage circuit 274 becomes the power loss of the constant voltage circuit 274. That is, the power loss in the constant voltage circuit 274 increases as the voltage drop amount of the input voltage increases. Therefore, ideally, if the input voltage of the constant voltage circuit 274 can be controlled to be the minimum operating voltage of the constant voltage circuit 274 (reference voltage V _ref 1), the power loss in the constant voltage circuit 274 is lost. Can be minimized.

On the other hand, in the power supply device 270 of this example, when the input voltage of the constant voltage circuit 274 changes due to the increase / decrease of the load current or the voltage change of the primary transformer 271a, the variable impedance unit is controlled by the control unit 278 as described above. The impedance of 272 is adjusted. Specifically, the control unit 278 adjusts the impedance of the variable impedance unit 272 so that the input voltage of the constant voltage circuit 274 becomes substantially the same value as the reference voltage V _ref 1 output from the first reference voltage power supply 275. To do. Therefore, in the power supply device 270 of this example, the input voltage value of the constant voltage circuit 274 can be controlled to be the value of the minimum operating voltage (reference voltage V _ref 1) of the constant voltage circuit 274. The loss at 274 can be minimized.

  Further, in the conventional general voltage drop type power supply device, the input voltage of the constant voltage circuit is stabilized by the variable resistor, so that power loss occurs in the variable resistor. On the other hand, in this example, since the voltage is dropped by changing the capacitance of the variable capacitor included in the variable impedance unit 272, no power loss is caused by the resistance component. Therefore, in the power supply device 270 of this example, power loss can be reduced as compared with the conventional power supply device.

  Note that, in this example, the circuit on the power input side of the variable impedance unit 272 is described as an example configured with the commercial power supply 280 and the power transformer 271, but the present disclosure is not limited to this. For example, the circuit on the power input side of the variable impedance unit 272 may be configured with a switch power supply. For example, by using a switch power supply whose output is turned ON / OFF at a switching frequency of 100 kHz, a power supply apparatus that performs the same operation as the power supply apparatus 270 shown in FIG. 28 can be realized.

  Further, in the power supply device 270 of this example, the output is one system, but the present disclosure is not limited to this. For example, a power supply device having a plurality of output systems (power supply systems) can be configured by providing a plurality of output terminals of a power transformer.

[Application Example 5: Other electronic devices]
The variable capacitance element of the present disclosure can also be applied to various electronic devices configured by appropriately combining the communication system, the wireless charging system, and the power supply device described in Application Examples 2 to 4, respectively. In this case, the configurations of the transmission device (communication device unit) and the reception device of the communication system incorporated in the electronic device are the same as those of the transmission device 221 and the reception device 222 described in Application Example 2 (FIG. 26), respectively. However, non-contact communication is performed with the outside.

  Examples of electronic devices including a communication system and a wireless charging system include devices such as a mobile phone, a smartphone, a tablet PC (Personal Computer), a notebook PC, a remote controller, and a wireless speaker. Examples of electronic devices including a communication system and a wireless charging system include devices such as camcorders, digital cameras, portable audio players, 3D glasses, and portable game devices.

  Examples of electronic devices including a communication system and a power supply unit (power supply unit) include, for example, devices such as tablet PCs, notebook PCs, desktop PCs, printers, projectors, liquid crystal televisions, home game machines, and refrigerators. Can be mentioned. Examples of electronic devices including a communication system and a power supply device (power supply device unit) include devices such as a DVD (Digital Versatile Disc) / BD (Blu-ray Disc: registered trademark) player and a DVD / BD recorder. . Furthermore, an electronic device including a communication system and a power supply device (power supply device portion) can also be applied to an electric vehicle.

  Examples of electronic devices including a wireless charging system and a power supply device (power supply device unit) include devices such as notebook PCs, portable televisions, radios, radio cassette recorders, electric toothbrushes, electric shavers, and irons. An electronic device including a wireless charging system and a power supply device (power supply device portion) can also be applied to an electric vehicle.

  Examples of electronic devices including a communication system, a wireless charging system, and a power supply device (power supply device unit) include devices such as notebook PCs, portable televisions, radios, and radio cassette recorders. In addition, an electronic device including a communication system, a wireless charging system, and a power supply device (power supply device unit) can also be applied to an electric vehicle.

  The technology of the present disclosure can also be applied to various electronic devices as described above, and the same effect can be obtained. In this case, various control units for controlling each device (system) may be provided for each device, and when there are a plurality of control units that can be used in common among the devices, You may comprise integrally.

  Moreover, the variable capacitance element of this indication is applicable also to the adjustment apparatus used in order to perform frequency adjustment before shipment of a non-contact communication apparatus, for example. However, in this case, the operation control of the voltage generation circuit can be controlled by a processing circuit unit such as an LSI (Large Scale Integration) in the adjustment device.

In addition, this indication can also take the following structures.
(1)
An element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a control voltage signal applied from the outside;
A second variable capacitor unit including a second dielectric layer formed of the ferroelectric material, connected to the element body unit, and a correction unit whose capacitance changes according to the control voltage signal;
A first signal external terminal connected to the element body and receiving an AC signal;
A second signal external terminal connected to the element body or the correction unit and receiving an AC signal;
An external terminal for control connected to the element body and to which the control voltage signal is input;
A variable capacitance element comprising: a capacitance correction external terminal connected to the correction unit.
(2)
The element main body and the correction unit are connected in series,
The variable capacitance element according to (1), wherein the second signal external terminal is connected to the correction unit.
(3)
The correction unit includes a plurality of second variable capacitor units, and the plurality of second variable capacitor units are connected in parallel.
One end of each second variable capacitor portion is connected to the element body portion,
Of the plurality of second variable capacitor units, the other end of one of the second variable capacitor units is connected to the second signal external terminal,
The capacitance correction external terminal is provided for each of the other ends of the remaining second variable capacitor section, and the other end of the remaining second variable capacitor section corresponds to the corresponding capacitance correction external terminal. The variable capacitance element according to (1) or (2), which is connected to a terminal.
(4)
The correction unit includes a plurality of second variable capacitor units, and the plurality of second variable capacitor units are connected in series,
One end of a series circuit composed of the plurality of second variable capacitor portions is connected to the element body portion,
The other end of the series circuit is connected to the second signal external terminal;
The capacitance correction external terminal is provided for each connection point of the two adjacent second variable capacitor units adjacent to each other, and each connection point is connected to the corresponding capacitance correction external terminal (1) or (2 ).
(5)
The element body and the correction unit are connected in parallel,
The second signal external terminal is connected to the element body;
The variable capacitance element according to (1), wherein one end of the correction unit is connected to the first signal external terminal, and the other end is connected to the capacitance correction external terminal.
(6)
The correction unit includes a plurality of second variable capacitor units, and the plurality of second variable capacitor units are connected in series,
One end of a series circuit composed of the plurality of second variable capacitor units is connected to the first signal external terminal, and the other end is connected to the capacitance correction external terminal. ) Or the variable capacitance element according to (5).
(7)
An element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a control voltage signal applied from the outside;
A second variable capacitor unit including a second dielectric layer formed of the ferroelectric material, connected to the element body unit, and a correction unit whose capacitance changes according to the control voltage signal;
A first signal external terminal connected to the element body and receiving an AC signal;
A second signal external terminal connected to the element body or the correction unit and receiving an AC signal;
An external terminal for control connected to the element body and to which the control voltage signal is input;
An external terminal for capacitance correction connected to the correction unit;
And a bias resistor connected to the control external terminal.
(8)
The mounting circuit according to (7), further comprising an external wiring that electrically connects the second signal external terminal and the capacitance correction external terminal.
(9)
An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal A resonance capacitor including a variable capacitance element having a control external terminal to which is input, and a capacitance correction external terminal connected to the correction unit;
A resonance circuit comprising: a resonance coil connected to the resonance capacitor.
(10)
An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal Including a resonance capacitor including a variable capacitance element having a control external terminal to which is input, and a capacitance correction external terminal connected to the correction unit, and a resonance coil connected to the resonance capacitor, Non-contact A receiving antenna unit that performs signal,
A voltage generation circuit that outputs the control voltage signal to the control external terminal of the variable capacitance element.
(11)
An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal A transmission antenna unit including a resonance capacitor including a variable capacitance element having a control external terminal to which is input, and a capacitance correction external terminal connected to the correction unit, and a resonance coil connected to the resonance capacitor A transmitting device having,
A communication system comprising: a receiving device that performs non-contact communication with the transmitting device.
(12)
A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having A power supply device having a configured power feeding antenna unit through the first resonance coil connected to the first resonance capacitor,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having The second is composed of the resonant coil, the wireless charging system comprising a power receiving device having a power receiving antenna unit for performing non-contact communication with the feeding antenna unit which is connected to the second resonant capacitor.
(13)
A power supply unit;
A rectifier circuit unit that converts AC power supplied from the power supply unit into DC power;
An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal And a variable impedance element provided between the power supply unit and the rectifier circuit unit, including a variable capacitance element having a control external terminal to which is input and a capacitance correction external terminal connected to the correction unit With department Power supply.
(14)
An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal Is formed by a resonance capacitor including a variable capacitor having a control external terminal to which is input, and a capacitance correction external terminal connected to the correction unit, and a resonance coil connected to the resonance capacitor, A communication unit that performs non-contact communication,
An electronic device comprising: a voltage generation circuit that outputs the control voltage signal to the control external terminal of the variable capacitance element.
(15)
A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having A feeding device portion having constituted feeding antenna unit through the first resonance coil connected to the first resonance capacitor,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having The second is composed of a resonant coil, an electronic device and a power receiving device portion having a power receiving antenna unit for performing non-contact communication with the feeding antenna unit which is connected to the second resonant capacitor.
(16)
A power supply unit;
A rectifier circuit unit that converts AC power supplied from the power supply unit into DC power;
An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal And a variable impedance element provided between the power supply unit and the rectifier circuit unit, including a variable capacitance element having a control external terminal to which is input and a capacitance correction external terminal connected to the correction unit With department Electronics.
(17)
A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having And a first resonance coil connected to the first resonance capacitor, and a communication unit having a receiving antenna unit for performing external non-contact communication,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having A feeding device portion having constituted feeding antenna unit by the second resonance coil connected to the second resonant capacitor,
A third element body portion having a fifth variable capacitor portion including a fifth dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a third control voltage signal applied from the outside; A third correction having a sixth variable capacitor portion including a sixth dielectric layer formed of a dielectric material, connected to the third element body portion, and having a capacitance that changes in accordance with the third control voltage signal Signal, a fifth signal external terminal connected to the third element body and receiving an AC signal, a sixth signal connected to the third element body or the third correction unit and receiving an AC signal An external terminal for connection, a third external terminal for control connected to the third element main body and to which the third control voltage signal is inputted, and an external terminal for capacitance correction connected to the third correction unit, A third resonant capacitor including a third variable capacitor having The third is constituted by a resonance coil, an electronic device and a power receiving device portion having a power receiving antenna unit for performing non-contact communication with the feeding antenna unit which is connected to the third resonance capacitor.
(18)
A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having And a first resonance coil connected to the first resonance capacitor, and a communication unit having a receiving antenna unit for performing external non-contact communication,
A power supply unit; a rectifier circuit unit that converts AC power supplied from the power supply unit into DC power; and a third variable capacitor unit including a third dielectric layer formed of a ferroelectric material. And a second element body portion whose capacitance changes in response to a second control voltage signal applied from outside, a fourth variable capacitor portion including a fourth dielectric layer formed of the ferroelectric material, A second correction unit that is connected to the second element body and has a capacitance that changes according to the second control voltage signal; a third signal external terminal that is connected to the second element body and receives an AC signal A fourth signal external terminal connected to the second element body or the second correction unit and receiving an AC signal; connected to the second element body and receiving the second control voltage signal; Connected to the second control external terminal and the second correction unit An electronic device comprising: a second variable capacitance element having a second capacitance correction external terminal; and a power supply device section having a variable impedance section provided between the power supply section and the rectifier circuit section. .
(19)
A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and a first external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having A feeding device portion having constituted feeding antenna unit through the first resonance coil connected to the first resonance capacitor,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having A second is composed of the resonant coil, the power receiving device portion having a power receiving antenna unit for performing the feeding antenna unit and the non-contact communication which is connected to the second resonant capacitor,
A power supply unit; a rectifier circuit unit that converts AC power supplied from the power supply unit into DC power; and a fifth variable capacitor unit that includes a fifth dielectric layer formed of a ferroelectric material. And a third element body portion whose capacitance changes in response to a third control voltage signal applied from the outside, and a sixth variable capacitor portion including a sixth dielectric layer formed of the ferroelectric material, A third correction unit connected to the third element body and having a capacitance that changes in response to the third control voltage signal; and a fifth signal external terminal connected to the third element body and receiving an AC signal A sixth signal external terminal connected to the third element body or the third correction unit and receiving an AC signal; connected to the third element body and receiving the third control voltage signal; Connected to third control external terminal and third correction unit An electronic device comprising: a third variable capacitance element having a third capacitance correction external terminal; and a power supply device section having a variable impedance section provided between the power supply section and the rectifier circuit section. .
(20)
A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having And a first resonance coil connected to the first resonance capacitor, and a communication unit having a receiving antenna unit for performing external non-contact communication,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having A feeding device portion having constituted feeding antenna unit by the second resonance coil connected to the second resonant capacitor,
A third element body portion having a fifth variable capacitor portion including a fifth dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a third control voltage signal applied from the outside; A third correction having a sixth variable capacitor portion including a sixth dielectric layer formed of a dielectric material, connected to the third element body portion, and having a capacitance that changes in accordance with the third control voltage signal Signal, a fifth signal external terminal connected to the third element body and receiving an AC signal, a sixth signal connected to the third element body or the third correction unit and receiving an AC signal An external terminal for connection, a third external terminal for control connected to the third element main body and to which the third control voltage signal is inputted, and an external terminal for capacitance correction connected to the third correction unit, A third resonant capacitor including a third variable capacitor having A third is composed of a third resonant coil connected to the resonance capacitor, the power receiving device portion having a power receiving antenna unit for performing non-contact communication with the feeding antenna unit,
A power supply unit; a rectifier circuit unit that converts AC power supplied from the power supply unit into DC power; and a seventh variable capacitor unit that includes a seventh dielectric layer formed of a ferroelectric material. And a fourth element body portion whose capacitance changes according to a fourth control voltage signal applied from the outside, and an eighth variable capacitor portion including an eighth dielectric layer formed of the ferroelectric material, A fourth correction unit connected to the fourth element body and having a capacitance that changes in response to the fourth control voltage signal; a seventh signal external terminal connected to the fourth element body and receiving an AC signal An eighth signal external terminal connected to the fourth element body or the fourth correction unit and receiving an AC signal; connected to the fourth element body and receiving the fourth control voltage signal; Connected to the fourth control external terminal and the fourth correction unit An electronic apparatus comprising: a fourth variable capacitance element having a fourth capacitance correction external terminal; and a power supply unit having a variable impedance unit provided between the power supply unit and the rectifier circuit unit. .

1, 2, 10, 30, 50, 70, 100 ... variable capacitance element, 3, 11, 31, 101 ... capacitor body, 4, 12, 32, 52, 72, 102 ... correction unit, 5, 13 ... signal External terminal for 6, external terminal for correction, 7 internal terminal, 8 first correction capacitor part, 9 second correction capacitor part, 14 external terminal for control 15, external terminal for second control, 16 ... 1st correction external terminal, 17 ... 2nd correction external terminal, 18 ... 3rd correction external terminal, 20, 25, 40, 60, 80, 90, 95, 100, 110, 115 ... mounting circuit, 21, 91, 111 ... external wiring, 61,81 ... selection unit, 62,82 ... first external wiring, 63,83 ... second external wiring, 64 ... third external wiring, 200 ... communication device, 201 ... receiving unit 210 ... Resonant antenna 211 ... Voltage generator circuit 213 ... Resonance coil, 214 ... resonance capacitor, 215 ... constant capacitance capacitor, 216 ... variable capacitor, 217 ... bias removal capacitor, 220 ... communication system, 221 ... transmitting device, 222 ... receiving device, 240 ... wireless charging system, 241 ... feeding Device, 242 ... power receiving device, 270 ... power supply device, 271 ... power supply transformer, 272 ... variable impedance unit, C1-C8, C31-C38 ... first to eighth variable capacitor unit, C39 ... ninth variable capacitor unit, C9, C40, C51, C71 ... first correction capacitor unit, C10, C41, C52, C72 ... second correction capacitor unit, C11, C53 ... third correction capacitor unit, C91 ... first variable capacitor unit, C92 ... second variable capacitor Part, C93 ... first correction capacitor part, C94 ... second correction capacitor part, 1 ... first bias resistor, R2 ... second bias resistor, Vc ... control voltage

Claims (20)

An element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a control voltage signal applied from the outside;
A second variable capacitor unit including a second dielectric layer formed of the ferroelectric material, connected to the element body unit, and a correction unit whose capacitance changes according to the control voltage signal;
A first signal external terminal connected to the element body and receiving an AC signal;
A second signal external terminal connected to the element body or the correction unit and receiving an AC signal;
An external terminal for control connected to the element body and to which the control voltage signal is input;
A variable capacitance element comprising: a capacitance correction external terminal connected to the correction unit. The element main body and the correction unit are connected in series,
The variable capacitance element according to claim 1, wherein the second signal external terminal is connected to the correction unit. The correction unit includes a plurality of second variable capacitor units, and the plurality of second variable capacitor units are connected in parallel.
One end of each second variable capacitor portion is connected to the element body portion,
Of the plurality of second variable capacitor units, the other end of one of the second variable capacitor units is connected to the second signal external terminal,
The capacitance correction external terminal is provided for each of the other ends of the remaining second variable capacitor section, and the other end of the remaining second variable capacitor section corresponds to the corresponding capacitance correction external terminal. The variable capacitance element according to claim 2, connected to a terminal. The correction unit includes a plurality of second variable capacitor units, and the plurality of second variable capacitor units are connected in series,
One end of a series circuit composed of the plurality of second variable capacitor portions is connected to the element body portion,
The other end of the series circuit is connected to the second signal external terminal;
The capacitance correction external terminal is provided for each connection point of the two second variable capacitor units adjacent to each other, and each connection point is connected to the corresponding capacitance correction external terminal. Variable capacitance element. The element body and the correction unit are connected in parallel,
The second signal external terminal is connected to the element body;
The variable capacitance element according to claim 1, wherein one end of the correction unit is connected to the first signal external terminal, and the other end is connected to the capacitance correction external terminal. The correction unit includes a plurality of second variable capacitor units, and the plurality of second variable capacitor units are connected in series,
The one end of a series circuit constituted by the plurality of second variable capacitor sections is connected to the first signal external terminal, and the other end is connected to the capacitance correcting external terminal. 5. The variable capacitance element according to 5. An element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a control voltage signal applied from the outside;
A second variable capacitor unit including a second dielectric layer formed of the ferroelectric material, connected to the element body unit, and a correction unit whose capacitance changes according to the control voltage signal;
A first signal external terminal connected to the element body and receiving an AC signal;
A second signal external terminal connected to the element body or the correction unit and receiving an AC signal;
An external terminal for control connected to the element body and to which the control voltage signal is input;
An external terminal for capacitance correction connected to the correction unit;
And a bias resistor connected to the control external terminal. The mounting circuit according to claim 7, further comprising an external wiring that electrically connects the second signal external terminal and the capacitance correction external terminal. An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal A resonance capacitor including a variable capacitance element having a control external terminal to which is input, and a capacitance correction external terminal connected to the correction unit;
A resonance circuit comprising: a resonance coil connected to the resonance capacitor. An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal Including a resonance capacitor including a variable capacitance element having a control external terminal to which is input, and a capacitance correction external terminal connected to the correction unit, and a resonance coil connected to the resonance capacitor, Non-contact A receiving antenna unit that performs signal,
A voltage generation circuit that outputs the control voltage signal to the control external terminal of the variable capacitance element. An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal A transmission antenna unit including a resonance capacitor including a variable capacitance element having a control external terminal to which is input, and a capacitance correction external terminal connected to the correction unit, and a resonance coil connected to the resonance capacitor A transmitting device having,
A communication system comprising: a receiving device that performs non-contact communication with the transmitting device. A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having A power supply device having a configured power feeding antenna unit through the first resonance coil connected to the first resonance capacitor,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having The second is composed of the resonant coil, the wireless charging system comprising a power receiving device having a power receiving antenna unit for performing non-contact communication with the feeding antenna unit which is connected to the second resonant capacitor. A power supply unit;
A rectifier circuit unit that converts AC power supplied from the power supply unit into DC power;
An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal And a variable impedance element provided between the power supply unit and the rectifier circuit unit, including a variable capacitance element having a control external terminal to which is input and a capacitance correction external terminal connected to the correction unit With department Power supply. An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal Is formed by a resonance capacitor including a variable capacitor having a control external terminal to which is input, and a capacitance correction external terminal connected to the correction unit, and a resonance coil connected to the resonance capacitor, A communication unit that performs non-contact communication,
An electronic device comprising: a voltage generation circuit that outputs the control voltage signal to the control external terminal of the variable capacitance element. A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having A feeding device portion having constituted feeding antenna unit through the first resonance coil connected to the first resonance capacitor,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having The second is composed of a resonant coil, an electronic device and a power receiving device portion having a power receiving antenna unit for performing non-contact communication with the feeding antenna unit which is connected to the second resonant capacitor. A power supply unit;
A rectifier circuit unit that converts AC power supplied from the power supply unit into DC power;
An element main body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a control voltage signal applied from the outside, and the ferroelectric material A second variable capacitor unit including the formed second dielectric layer, a correction unit connected to the element main body and having a capacitance that changes in accordance with the control voltage signal; connected to the element main body; and A first signal external terminal to which an AC signal is input, a second signal external terminal that is connected to the element body or the correction unit and receives an AC signal, is connected to the element body and the control voltage signal And a variable impedance element provided between the power supply unit and the rectifier circuit unit, including a variable capacitance element having a control external terminal to which is input and a capacitance correction external terminal connected to the correction unit With department Electronics. A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having And a first resonance coil connected to the first resonance capacitor, and a communication unit having a receiving antenna unit for performing external non-contact communication,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having A feeding device portion having constituted feeding antenna unit by the second resonance coil connected to the second resonant capacitor,
A third element body portion having a fifth variable capacitor portion including a fifth dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a third control voltage signal applied from the outside; A third correction having a sixth variable capacitor portion including a sixth dielectric layer formed of a dielectric material, connected to the third element body portion, and having a capacitance that changes in accordance with the third control voltage signal Signal, a fifth signal external terminal connected to the third element body and receiving an AC signal, a sixth signal connected to the third element body or the third correction unit and receiving an AC signal An external terminal for connection, a third external terminal for control connected to the third element main body and to which the third control voltage signal is inputted, and an external terminal for capacitance correction connected to the third correction unit, A third resonant capacitor including a third variable capacitor having The third is constituted by a resonance coil, an electronic device and a power receiving device portion having a power receiving antenna unit for performing non-contact communication with the feeding antenna unit which is connected to the third resonance capacitor. A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having And a first resonance coil connected to the first resonance capacitor, and a communication unit having a receiving antenna unit for performing external non-contact communication,
A power supply unit; a rectifier circuit unit that converts AC power supplied from the power supply unit into DC power; and a third variable capacitor unit including a third dielectric layer formed of a ferroelectric material. And a second element body portion whose capacitance changes in response to a second control voltage signal applied from outside, a fourth variable capacitor portion including a fourth dielectric layer formed of the ferroelectric material, A second correction unit that is connected to the second element body and has a capacitance that changes according to the second control voltage signal; a third signal external terminal that is connected to the second element body and receives an AC signal A fourth signal external terminal connected to the second element body or the second correction unit and receiving an AC signal; connected to the second element body and receiving the second control voltage signal; Connected to the second control external terminal and the second correction unit An electronic device comprising: a second variable capacitance element having a second capacitance correction external terminal; and a power supply device section having a variable impedance section provided between the power supply section and the rectifier circuit section. . A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having A feeding device portion having constituted feeding antenna unit through the first resonance coil connected to the first resonance capacitor,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having A second is composed of the resonant coil, the power receiving device portion having a power receiving antenna unit for performing the feeding antenna unit and the non-contact communication which is connected to the second resonant capacitor,
A power supply unit; a rectifier circuit unit that converts AC power supplied from the power supply unit into DC power; and a fifth variable capacitor unit that includes a fifth dielectric layer formed of a ferroelectric material. And a third element body portion whose capacitance changes in response to a third control voltage signal applied from the outside, and a sixth variable capacitor portion including a sixth dielectric layer formed of the ferroelectric material, A third correction unit connected to the third element body and having a capacitance that changes in response to the third control voltage signal; and a fifth signal external terminal connected to the third element body and receiving an AC signal A sixth signal external terminal connected to the third element body or the third correction unit and receiving an AC signal; connected to the third element body and receiving the third control voltage signal; Connected to third control external terminal and third correction unit An electronic device comprising: a third variable capacitance element having a third capacitance correction external terminal; and a power supply device section having a variable impedance section provided between the power supply section and the rectifier circuit section. . A first element body portion having a first variable capacitor portion including a first dielectric layer formed of a ferroelectric material, the capacitance of which varies according to a first control voltage signal applied from outside; A first correction having a second variable capacitor portion including a second dielectric layer made of a dielectric material, connected to the first element body portion, and having a capacitance that changes in accordance with the first control voltage signal , A first signal external terminal connected to the first element body and receiving an AC signal, a second signal connected to the first element body or the first correction unit and receiving an AC signal An external terminal for connection, a first external terminal for control connected to the first element main body and receiving the first control voltage signal, and an external terminal for capacitance correction connected to the first correction unit, A first resonant capacitor including a first variable capacitance element having And a first resonance coil connected to the first resonance capacitor, and a communication unit having a receiving antenna unit for performing external non-contact communication,
A second element body portion having a third variable capacitor portion including a third dielectric layer formed of a ferroelectric material and having a capacitance that changes in response to a second control voltage signal applied from the outside; A second correction capacitor having a fourth variable capacitor portion including a fourth dielectric layer formed of a dielectric material, wherein the second variable capacitor portion is connected to the second element body portion, and the capacitance is changed in accordance with the second control voltage signal; Part, a third signal external terminal connected to the second element body and receiving an AC signal, a fourth signal connected to the second element body or the second correction part and receiving an AC signal An external terminal for connection, a second external terminal for control connected to the second element main body and to which the second control voltage signal is input, an external terminal for capacitance correction connected to the second correction unit, A second resonant capacitor including a second variable capacitance element having A feeding device portion having constituted feeding antenna unit by the second resonance coil connected to the second resonant capacitor,
A third element body portion having a fifth variable capacitor portion including a fifth dielectric layer formed of a ferroelectric material, the capacitance of which changes according to a third control voltage signal applied from the outside; A third correction having a sixth variable capacitor portion including a sixth dielectric layer formed of a dielectric material, connected to the third element body portion, and having a capacitance that changes in accordance with the third control voltage signal Signal, a fifth signal external terminal connected to the third element body and receiving an AC signal, a sixth signal connected to the third element body or the third correction unit and receiving an AC signal An external terminal for connection, a third external terminal for control connected to the third element main body and to which the third control voltage signal is inputted, and an external terminal for capacitance correction connected to the third correction unit, A third resonant capacitor including a third variable capacitor having A third is composed of a third resonant coil connected to the resonance capacitor, the power receiving device portion having a power receiving antenna unit for performing non-contact communication with the feeding antenna unit,
A power supply unit; a rectifier circuit unit that converts AC power supplied from the power supply unit into DC power; and a seventh variable capacitor unit that includes a seventh dielectric layer formed of a ferroelectric material. And a fourth element body portion whose capacitance changes according to a fourth control voltage signal applied from the outside, and an eighth variable capacitor portion including an eighth dielectric layer formed of the ferroelectric material, A fourth correction unit connected to the fourth element body and having a capacitance that changes in response to the fourth control voltage signal; a seventh signal external terminal connected to the fourth element body and receiving an AC signal An eighth signal external terminal connected to the fourth element body or the fourth correction unit and receiving an AC signal; connected to the fourth element body and receiving the fourth control voltage signal; Connected to the fourth control external terminal and the fourth correction unit An electronic apparatus comprising: a fourth variable capacitance element having a fourth capacitance correction external terminal; and a power supply unit having a variable impedance unit provided between the power supply unit and the rectifier circuit unit. .